Chessboard cichlid

1) Where they come from

Chessboard cichlids (Dicrossus filamentosus) come from slow, plant- and leaf-litter-filled waters in the Amazon basin—think soft, tea-colored streams with roots, fallen branches, and dim light. That “blackwater” vibe explains a lot about what they like in the aquarium: calm flow, soft water, and lots of cover.

2) Setting up their tank

Give them a tank that feels safe first, pretty second. These fish relax when they have visual breaks and little “rooms” to hang out in. A 20 long can work for a pair, but I’ve had a much easier time in a 29–40 breeder where they can spread out and you’re not constantly managing territorial squabbles.

• Footprint > height: longer tanks make their lives easier
• Soft substrate: fine sand is my pick (they sift and poke around)
• Leaf litter: Indian almond leaves/oak leaves add cover and microfood
• Wood + roots: spiderwood/driftwood to break lines of sight
• Plants: floaters to dim the tank; hardy rooted plants or epiphytes on wood
• Gentle filtration: sponge filter or a canister with a spray bar turned down

They’re happiest in soft, acidic water. If your tap is hard, you can still keep them alive, but breeding and long-term condition gets way more hit-or-miss. I run them warm and calm, with very steady parameters and lots of oxygen.

3) What to feed them

These guys are picky in that “dwarf cichlid” way: they’ll eat, but they want food that looks alive. Once settled, they can learn pellets and flakes, but you’ll get better color and better breeding behavior with a rotation of frozen and live foods.

• Staples: frozen brine shrimp, mysis, daphnia, cyclops
• Treats: live baby brine, live daphnia, blackworms (use clean sources)
• Dry food: small sinking pellets/microgranules after they’re comfortable
• Avoid as a main diet: lots of tubifex or overly fatty foods (they get “puffy” and lazy)

4) Behavior and tankmates

Chessboard cichlids are generally peaceful, but they’re not pushovers. A settled male will posture, flare, and chase, especially during spawning. The trick is pairing them with fish that don’t bully them and don’t steal every bite of food.

• Good tankmates: small peaceful tetras (cardinals, rummynose), pencilfish, hatchetfish, small calm Corydoras
• Use caution: very active feeders (danios, bigger barbs), nippy tetras, boisterous livebearers
• Skip: aggressive cichlids, fin-nippers, anything that will camp their territory

They’re also surprisingly sensitive to “social pressure.” If you keep them with hyper fish, they tend to stay hidden and you’ll wonder where your expensive cichlids went. Calm dither fish help, but keep it reasonable.

5) Breeding tips

Breeding them is very doable, but they reward patience. Soft, acidic water makes a noticeable difference in fertility and egg survival. The female usually takes the lead—she’ll pick a site, lay eggs, and get very serious about guarding.

• Spawning sites: flat stones, broad leaves, or small sheltered areas under wood
• Conditioning: heavy frozen/live feeding for 1–2 weeks, then a big water change
• Water: soft and on the warmer side; stability beats chasing exact numbers
• Lighting: dimmer is better—floaters help a lot

If eggs keep fungusing, don’t assume the parents are “bad.” More often it’s water hardness, too much disturbance, or the pair not fully bonded yet. I’ve had pairs that needed a couple practice runs before they got it right.

6) Common problems to watch for

Most issues with Dicrossus come from three things: stress, water that’s too hard/dirty, or getting outcompeted for food. They’re not “glass fish,” but they do tell on you fast when something’s off.

• Hiding nonstop + clamped fins: usually stress from tankmates, bright light, or not enough cover
• Not eating: often new fish stress; try frozen foods and dim the tank for a few days
• Ragged fins: nipping tankmates or territorial fights—add sight breaks or separate
• White stringy poop / weight loss: internal parasites are common in wild imports; quarantine helps a ton
• Sudden losses after a water change: parameter swing (temp/pH/TDS); make changes smaller and match water closely