Virtual discus inspection: photo and video checklist before buying
Virtual discus inspection from a distance — 6 mandatory photo angles, 3 minutes of video (feeding + breathing + group), 12 critical questions for the seller and the traps of "polished" photos.
Quick summary
- A good virtual inspection covers a large share of what an in-person visit would catch for assessing discus health.
- Mandatory photos (6 angles): left side, right side, head-on, top (dorsal), underside (ventral), close-up of eyes + gills.
- Mandatory video (3 minutes): 1 min LIVE feeding, 1 min mid-water swimming, 1 min close-up of breathing + the group.
- 12 seller questions about water, feeding, age, source, health, quarantine and other species.
- Traps: red-light photos (hide lesions), Instagram filters, old photos (check EXIF date), "select" angles.
- The definitive test: a LIVE video with the date shown on the phone screen.
- For high-value purchases: combine 3 videos on different days + 10–15 detail photos.
In short
- A good virtual inspection covers a large share of what an in-person visit would catch for assessing discus health.
- Mandatory photos (6 angles): left side, right side, head-on, top (dorsal), underside (ventral), close-up of eyes + gills.
- Mandatory video (3 minutes): 1 min LIVE feeding, 1 min mid-water swimming, 1 min close-up of breathing + the group.
- 12 seller questions about water, feeding, age, source, health, quarantine and other species.
- Traps: red-light photos (hide lesions), Instagram filters, old photos (check the EXIF date), "select" angles.
- The definitive test: a LIVE video with the date shown on the phone screen.
- For high-value purchases: combine 3 videos on different days + 10–15 detail photos.
💱 The method is universal. Where a Romania price reference appears, it's clearly labelled as a Romania estimate — use your local market.
What you'll learn
Virtual discus inspection (Symphysodon) by photo and video is the standard method for distance purchases — many cross-region or cross-border transfers happen without an in-person visit. A good inspection can catch most health problems or scams before you pay; a poor one leaves you with a sick fish, a fake variety or a size smaller than promised. This guide gives you the complete checklist — which photos to request, which videos, which questions to ask and how to spot the usual traps of "polished" or old photos.
What you can assess virtually
✅ What you can assess well from photos and video
| Aspect | From photos | From video |
|---|---|---|
| Stress bars at rest | ✅ Excellent | ✅ Excellent |
| Body shape (round vs thin) | ✅ Good | ✅ Good |
| Colors and pattern | ✅ Excellent | ✅ Good |
| Large lesions (spots, ulcers, HITH) | ✅ Good | ✅ Good |
| Fins (torn, clamped) | ✅ Good | ✅ Excellent |
| Eyes (prominent / sunken) | ✅ Good | ⚠️ Hard close-up |
| Behavior (mid-water, corner) | ❌ No | ✅ Excellent |
| Breathing (rate) | ❌ No | ✅ Excellent (counting) |
| Reaction to food | ❌ No | ✅ Excellent |
| Group interaction | ❌ No | ✅ Excellent |
| Bullying / isolation | ❌ No | ✅ Good |
❌ What you can't assess remotely
- The smell of the tank (ammonia, rot)
- Sounds (noisy filtration, failing pumps)
- Real water quality (tests can be "arranged" for photos)
- Real lighting vs filters/post-processing
- Long-term behavior (a 3-min video can catch a "good" moment)
- Reaction to your hand / interaction with the seller
Mitigation: combining 2–3 videos on different days + 10–15 photos + a LIVE video call = wide coverage.
PHOTO checklist — 6 mandatory angles
Photo 1: Left side — whole body
Ask for: the discus oriented LEFT side-on, the whole frame, natural light or neutral LED (NOT red/yellow).
What you check:
- ✅ Stress bars (9 vertical bars) — visibility
- ✅ Body shape — round (healthy) vs thin/"butterfly" (wasted)
- ✅ Variety pattern — confirms the promised variety
- ✅ Lateral fins + dorsal
- ✅ Visible lesions
Photo 2: Right side — whole body
Why both sides? Many diseases are asymmetric (HITH on one side, parasites on one gill, ulcers only on the side it lies on).
Special attention:
- Compare color symmetry
- Check both gills (one-sided breathing = parasites)
Photo 3: Head-on — front view
What you check:
- ✅ Body width (healthy = full cheek)
- ✅ Symmetric, prominent eyes
- ✅ The typical "disc" shape
- ⚠️ Facial asymmetry = possible HITH or Mycobacterium
Photo 4: Dorsal — top view
Hard to get, but critical. Ask the seller to turn the discus with a clear container.
What you check:
- ✅ Body thickness (healthy = thick, "full" across the back)
- ❌ Wasting = a narrow "knife edge" along the spine
- ⚠️ Spinal deformities (fish TB / Mycobacterium)
Photo 5: Ventral — underside view (belly)
What you check:
- ✅ Flat belly (healthy)
- 🚨 Symmetrically swollen belly = constipation / Hexamita / early Dropsy
- 🚨 Inflamed / red vent = intestinal parasite
- ✅ Feces hanging from the vent = constipation
Photo 6: Close-up of head + gills
Macro focus on:
- ✅ Eyes — clear, no haze
- 🚨 Bluish eyes = bacterial infection
- 🚨 Bulging eyes = Popeye
- ✅ Gills — uniform pink-red
- 🚨 Pale gills = anemia / parasites
- 🚨 Inflamed gills = gill disease
- ✅ Mouth — naturally closed
- 🚨 Mouth held open permanently = Columnaris / gill disease
BONUS photo: The tank bottom (feces)
MANDATORY. Ask the seller to stop filtration for 10 min + photograph the tank bottom.
What you check:
- ✅ Compact brown feces = normal digestion
- 🚨 White stringy feces = Hexamita
- 🚨 Bloody feces = internal hemorrhage
- ⚠️ Food remains = overfeeding / fish not eating
VIDEO checklist — 3 mandatory minutes
Video 1: LIVE feeding (60 seconds)
The most important evidence. Ask the seller to FEED the discus LIVE.
What you check:
| Behavior | Interpretation |
|---|---|
| Comes FIRST to food (≤10 sec) | ✅ Dominant, healthy |
| Comes within 30–60 sec | ✅ Normal |
| Comes last, eats little | ⚠️ Intimidated / adjusting |
| Doesn't come at all | 🚨 DISEASE — refuse |
| Comes but spits it out | 🚨 Oral problems / Columnaris |
| Eats then leaves immediately | ⚠️ Stress in the group |
RULE: a seller who refuses a live feeding = there's a reason — don't buy.
Video 2: Mid-water swimming + group (60 seconds)
A relaxed shot, without the seller's hand in frame.
What you check:
- ✅ ACTIVE mid-water swimming
- ✅ A compact group, shoaling
- ⚠️ Your discus isolated from the group = bullying / disease
- 🚨 On the bottom 60+ sec = serious condition
- 🚨 Tilted sideways swimming = swim-bladder problems
- 🚨 Floating at the surface with the mouth open = suffocation
Video 3: Close-up of breathing + body (60 seconds)
Camera 30 cm (~12 in) away, focused on the gills and flanks.
What you count:
- Gill beats over 60 seconds — normal 60–80/min, over 100 = gill parasites, over 120 = EMERGENCY.
- SYMMETRIC breathing (both gills opening equally) — one-sided = unilateral parasites.
- Gulps of air at the surface — frequent = oxygen deficit.
Body details:
- ✅ Normal slime coat (a subtle sheen)
- 🚨 Excess slime ("haze" on the body) = parasites / osmotic shock
- 🚨 Silvery glints on the body = Costia / Trichodina
- 🚨 White spots like grains = Ich
12 MANDATORY questions for the seller
About the fish
-
"What's the EXACT variety and genetic source?" — a good answer: "Red Turquoise Stendker, 2024 batch" or "Albino Ring Leopard, Asian Malaysia, imported 6 months ago." A vague answer = an amateur seller or a scam.
-
"How old is the fish (months/years)?" — matters for value and breeding. 6 months = juvenile (buying for growth), 18 months = sub-adult, 3+ years = adult (buying for immediate breeding).
-
"What's the EXACT size in cm?" — measured from the snout tip to the base of the tail. Not "8–10 cm approximately" — exactly "9 cm / 3.5 in" or "8.5 cm / 3.3 in."
-
"How long have you had it in the tank?" — under 2 weeks = a reseller (don't buy without your own extended quarantine). 2+ months = it's been observed in the seller's tank = less risk.
About health
-
"Has it ever been treated for disease? For what and when?" — an honest answer = "Yes, Hexamita 6 months ago, fully recovered" is fine. "No, never" for an adult = possibly untrue (most discus go through something in their lives).
-
"Do you quarantine new fish?" — the EXPECTED answer: "Yes, 4 weeks minimum, separate from my stock." "No" or "I add them straight in" = don't buy.
-
"How do you feed, and how many times a day?" — a good answer: "2–3×/day with premium pellets + thawed brine shrimp + beef heart 1×/week." "Normal food" = an amateur.
About water
-
"What are the EXACT water parameters?" (pH, TDS, T°, GH, KH) — the expected answer: exact numbers tested weekly. "Normal water" = they don't test = don't buy.
-
"Do you use tap water or RO?" — for Asian discus it should be RO + remineralizer. For Stendker, hard tap water is fine.
About logistics
-
"How do you transport the fish?" — the expected answer: double bag + pure oxygen + insulated box + a heat pack in winter. Not "in a normal bag."
-
"Do you offer a DOA (Dead On Arrival) guarantee?" — the minimum acceptable answer: 7 days. A serious seller: 14–30 days for death through no fault of yours.
-
"Can we do a LIVE video call now / tomorrow to see the fish?" — the expected answer: "Yes, any time during working hours." A refusal / a delay > 48h = a problem.
The traps of "polished" photos
🚨 Trap 1: Red / orange light
Why it's used: it hides paleness, boosts reds and masks small lesions.
Test: ask for a photo with neutral light (6500K LED) or natural daylight.
🚨 Trap 2: Instagram filters / post-processing
Signs:
- Unnaturally "over-saturated" colors
- Extreme contrast (crushed blacks, blown-out whites)
- "Glued" edges (over-sharpened)
- An artificially blurred background
Test: ask for raw photos straight off the phone + possibly with the EXIF date visible.
🚨 Trap 3: Old or stock photos
Signs:
- The same photos across Facebook + Instagram + classifieds (= "marketing" photos)
- Professional photo quality (an amateur seller doesn't have it)
- A reverse Google image search → photos from Asian websites
Mandatory test: ask for a photo WITH A SPECIFIC OBJECT by the tank (today's newspaper, or a sheet of paper with your name and the date).
🚨 Trap 4: "Select" angles
Technique: the seller films ONLY the good side of the fish (the side without lesions).
Mitigation: ask for ALL 6 MANDATORY angles from the checklist + 2–3 short videos from DIFFERENT DAYS.
🚨 Trap 5: "Display" tank vs real tank
Trick: the seller has 1 "display" tank with perfect water for photos, but the real fish are in another, dirty tank.
Test: ask for a video in which the seller MOVES the fish from one tank to another (or ask for multiple backgrounds).
🚨 Trap 6: Substitution on delivery
A common scam: photos of premium fish A, delivery of less valuable fish B (a different variety, a smaller size).
Mitigation:
- ✅ Photos + video specific to the exact fish you'll receive
- ✅ A photo of a distinctive mark (a unique asymmetry, a specific pattern) on your fish
- ✅ Payment on delivery (cash on delivery via courier) or an in-person meeting
- ✅ Refuse the fish on delivery if it doesn't match — don't pay
LIVE video call — the definitive test
For high-value purchases, insist on a 10–15 min LIVE video call.
What to ask to see:
- ✅ The whole tank — not just your fish, but the entire environment
- ✅ A thermometer on the tank — read the temperature LIVE
- ✅ A LIVE feeding — see the fish react in real time
- ✅ The seller's hand at all times (no environment swap)
- ✅ The date and time shown on the phone (check EXIF)
- ✅ A personal exchange — spontaneous questions (to verify it's not a pre-recorded video)
Apps for the LIVE video:
- WhatsApp video call
- Telegram video call
- FaceTime (Apple)
- Google Meet / Zoom (more formal)
It costs nothing, takes 15 min and avoids the loss of a fish you can't return.
Reverse image check
Check the photos you receive with a reverse image search:
- Save the photo
- Go to images.google.com
- Click the camera icon (search by image)
- Upload the photo
- Check whether identical results appear on other sites / forums
If the photo appears on Asian breeder sites, on Pinterest or on forums = a stolen photo, the seller doesn't have it (a scam).
Final virtual-inspection checklist
BEFORE contacting the seller
- ☐ Research the seller online (Facebook, forums, reviews)
- ☐ Check real market prices for the variety
- ☐ Prepare the list of 12 MANDATORY questions
When talking to the seller
- ☐ Ask for the 6 MANDATORY photo angles
- ☐ Ask for 3 videos (feeding + swimming + close-up breathing)
- ☐ Ask all 12 questions
- ☐ Run a reverse image search on the photos received
- ☐ Ask for a photo WITH A SPECIFIC OBJECT by the tank for authenticity
- ☐ A LIVE video call of 10–15 min (for high-value purchases)
ABSOLUTE RULES — refuse the purchase
- ❌ Seller refuses a LIVE video
- ❌ Seller refuses a live feeding
- ❌ Won't send the 6 MANDATORY angles
- ❌ The photos appear on other sites (reverse image search)
- ❌ Only "polished" / Instagram photos
- ❌ Doesn't know the EXACT water parameters
- ❌ Demands full payment up front by instant transfer
On arrival — final check
- ☐ Compare the fish with the photos received (distinctive marks)
- ☐ Check ALL lesions (body, fins, eyes)
- ☐ Count breathing for 60 sec
- ☐ Observe behavior for 15 min in the bag
- ☐ Refuse delivery if it differs from what was promised
Common virtual-inspection mistakes
❌ "The photos looked good, I didn't ask for video" — photos are "taken at good times," a LIVE video doesn't lie.
❌ "I trusted the seller without a reverse image check" — some sketchy sellers use stolen photos. The check takes 30 seconds.
❌ "I accepted red-light photos" — they hide many lesions. Ask for neutral LED or daylight.
❌ "I didn't insist on a LIVE feeding because they were busy" — a serious seller has 60 seconds to feed. A refusal = a problem.
❌ "I paid 100% up front based on photos" — never. Pay on delivery or cash on delivery.
❌ "I didn't verify the delivered fish = the fish in the photos" — substitution is common. Ask for distinctive marks (a unique pattern).
❌ "A 30-second video call was all the seller wanted" — 30 seconds isn't enough to evaluate. Insist on 10–15 min.
What to do next
📚 Physical and behavioral red flags: Red flags when buying discus.
🩺 Full body language: Discus body language.
🔬 Mandatory post-purchase protocol: 4-week quarantine.
🚚 Safe transport after buying: Discus transport.
🌍 For direct import: Importing discus from Asia.
🤝 Verified breeders: Discus.ro breeders.