The honest cost

How much does a Keyhole Cichlid cost to keep? — the keyhole cichlid itself is usually the cheapest part.

The honest answer: the keyhole cichlid itself is usually the cheapest part. Here's what it really costs — the upfront setup, the ongoing monthly costs, and where it's safe to save vs never cut corners. We don't quote prices (they vary by country, currency and month) — we show you what you're paying for and where the money actually goes.

💷 Upfront — the one-time setup

What you need before the keyhole cichlid comes home. The setup, not the fish, is the real cost of entry.

The tank: Sized for an adult (Keeper-facing minimum for a bonded pair: about 150 L / 40 US gal (a real 90 cm / 3 ft tank). SeriouslyFish gives a base footprint of 90 x 30 cm (~81 L / ~21 US gal), but that is a floor for the species, not a comfortable pair-plus-community home. Bigger-is-better reality: for a small group grown out together, or a pair in a planted community, aim for a 75 US gal / ~280 L tank. Footprint (floor length x width) matters far more than raw litres for a territorial fish.). This is the single biggest cost — and the number-one thing beginners under-buy. A bigger tank is more stable AND cheaper than replacing a small one you've outgrown.
A filter: A filter rated comfortably above the tank volume (Gentle to moderate flow - these are slow-water/blackwater fish and dislike strong current. Use efficient biological filtration (a mature, well-cycled filter) but diffuse or baffle the outflow so the water surface is calm. Sensitive to poor water quality, so filtration + regular water changes matter more than turnover rate.). Under-filtering causes most of the problems people blame on the fish — the bigger, right filter is the cheap insurance.
A heater + thermostat: This is a tropical fish (21-28 C (70-82 F); most keepers settle around 24-26 C (75-79 F).) — it needs a thermostatically-controlled heater holding a stable temperature, day and night. Coldwater species don't need one; this one does.
Substrate, décor & plants: The substrate, hides, and real or silk plants. This is where you CAN save — sand/plain gravel, DIY hardscape and hardy plants do the job as well as branded aquascaping kit.
A water test kit + dechlorinator: A liquid test kit (ammonia, nitrite, nitrate, pH) and a water conditioner. These are essential, not optional — you cannot keep fish safely without testing your water and dechlorinating every top-up and water change.
The fish itself: Usually the SMALLEST line on this whole list. The price of the keyhole cichlid tells you almost nothing about the cost of keeping it well.

🔁 Ongoing — the part people forget

The costs that keep coming for the fish's whole life (7-10 years with good care; well-kept fish can pass 10. Long-lived for a small cichlid - a genuine multi-year commitment.).

Food: Its diet (Omnivore (foraging omnivore in the wild) with a lean toward meaty foods. Takes most prepared foods readily.). Modest per month, but constant for the fish's whole life — and this species can live 7-10 years with good care; well-kept fish can pass 10. Long-lived for a small cichlid - a genuine multi-year commitment..
Electricity: The hidden monthly cost: the heater and the filter run 24/7. Over a year the power bill can quietly rival the food bill — and it scales with a bigger, correct tank.
Consumables: The recurring replacements: dechlorinator / water conditioner, test-kit refills, replacement filter media, and — if you keep live plants — root tabs or liquid ferts. Small, regular, easy to forget when you budget.
Vet care: Aquatic / fish vets are rare and pricier than a cat-or-dog vet, so keep an emergency mindset and a small fund. Reptiles and fish alike hide illness until it's advanced. Find a fish vet BEFORE you need one — start with the Keyhole Cichlid vet-prep sheet below.

✅ Worth the money

Water first. Aim for soft-to-moderate, slightly acidic-to-neutral water: pH 6.0-7.5, hardness roughly 2-15 dGH, temperature 24-26 C (75-79 F) within a tolerated 21-28 C (70-82 F). This is a SOUTH AMERICAN soft-water cichlid - do NOT put it in the hard, alkaline water suited to African Rift-lake cichlids; that is the single most common chemistry mistake.
Cycle the tank fully before the fish arrive. Keyholes are reasonably hardy once settled but genuinely sensitive to ammonia, nitrite and creeping nitrate. You want 0 ammonia, 0 nitrite, and nitrate kept low with regular partial water changes.
SeriouslyFish gives a base footprint of 90 x 30 cm (~81 L / ~21 US gal). Treat that as a floor: for a comfortable bonded pair in a planted community, ~150 L / 40 US gal is a fair keeper-facing minimum, and a group grown out together is happier in a 75 US gal / ~280 L tank. Floor space and length beat height.
Aquascape for security and broken lines-of-sight: fine sand substrate, driftwood, leaf litter, rockwork and caves, with dense planting around the back and sides and open swimming lanes at the front. A shy fish with hiding spots is a visible, confident fish; a shy fish in a bare tank is an invisible one.
Keep flow gentle - baffle or spread the filter return so the surface stays calm, echoing the slow blackwater they come from. Subdued lighting and floating plants or tannin-stained water bring out their colour and confidence.
Add a few small, peaceful dither fish (see tankmates). Keyholes use the calm behaviour of open-swimming schoolers as an all-clear signal, so dithers make the cichlids bolder and more visible.

These are this species' own sourced setup essentials from our keyhole cichlid care sheet — get these right.

🟡 Save your money

All-in-one "starter kit" bundles that lock you into a small tank — the tank is usually the wrong size, so the "saving" costs you an upgrade.
Decorative gimmicks — coloured gravel, plastic ornaments and novelty décor do nothing for the fish; plain substrate, wood, rock and plants are cheaper and better.
Gimmick "cures", tonics and clarifiers — most mask a water problem instead of fixing it. A test kit and water changes are the real fix.

⛔ Never buy

A fish BOWL or vase — no room, no filter, no heater. It is the number-one cause of avoidable fish death, not a starter home.
A tank sold as a "complete setup" that is too small for a keyhole cichlid — you will pay twice when you have to upgrade.
No dechlorinator — tap water contains chlorine/chloramine that kills fish and the beneficial bacteria your filter needs. This is never the place to save.
An undersized filter to "match" a small tank — under-filtering is behind most water-quality problems.

Cheap, common, and harmful — true for every freshwater fish.

The one rule on cost: budget where it's safe — a second-hand tank, DIY or plain décor and substrate — but never cheap out on the tank size, the filter, a dechlorinator, or a test kit. Those are where cutting corners costs the keyhole cichlid its health, and usually costs you more later. We don't quote prices — check current local prices where you live; this is what to budget for.

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Cost questions

How much does a keyhole cichlid cost to keep?

More than it costs to buy — the keyhole cichlid is usually the cheapest part. The real cost is the setup (the tank, a filter, a heater, substrate and décor, and a test kit plus dechlorinator), then the ongoing food, electricity, consumables and vet care. We don't quote a figure because prices vary a lot by country, currency and month — this page shows exactly what you're paying for and where the money goes, so you can price it up locally.

What are the ongoing monthly costs of a keyhole cichlid?

Food, electricity for the heater and filter that run 24/7, recurring consumables (dechlorinator, test-kit refills, filter media), and — the big variable — vet care: keep a small emergency fund, because fish vets are rare and pricier. This species can live 7-10 years with good care; well-kept fish can pass 10. Long-lived for a small cichlid - a genuine multi-year commitment., so these small monthly costs add up over its life.

Why does the setup cost more than the keyhole cichlid itself?

Because you're not buying a fish — you're building its whole environment. A keyhole cichlid needs its tank, a cycled filter, stable tropical warmth, and clean, tested, dechlorinated water, and that equipment is where the money goes. The purchase price of the keyhole cichlid tells you almost nothing about the cost of keeping it properly.

Where can I save money on a keyhole cichlid — and where shouldn't I?

Safe to save: budget on décor and substrate, and buy a second-hand tank (glass lasts). Never cheap out on the tank SIZE, the filter, a dechlorinator, or a test kit — those four are where saving money costs the fish its health, and usually costs you more later.