Diamond Apistogramma

Diamond Apistogramma (Apistogramma eremnopyge) is one of the smallest and most specialized Apistogramma species — a genuine blackwater micro-predator from Peru. The species name eremnopyge means 'dark rump,' referencing the distinctive dark posterior body marking. Despite its tiny size, males display a beautiful palette of blue iridescence, yellow body tones, and vivid fin coloration.

Feeding & Care Tip: This is a smaller species that benefits from finer foods. Crush Sera Vipan Baby lightly or soak and crush Hikari Micro Pellets before feeding. Hikari Vibra Bites work well as a treat — the sinking worm-like shape is very appealing to this micro-predator. This species genuinely needs very soft, acidic water — color and health both suffer in harder or more alkaline conditions. Indian almond leaves, driftwood tannins, and a dark substrate are essential, not optional. For breeding conditioning, Hikari Frozen or Freeze-Dried Tubifex Worms fed 2–3 times per week are highly effective at triggering spawning.

Native exclusively to the Rio Pintuyacu, a blackwater tributary of the Rio Itaya near Iquitos in Loreto, Peru. The tributaries of this system carry extremely soft, acidic blackwater with pH around 5 in the wild. In the aquarium, our standard floor of pH 6.0 applies, but this species will show its best color and most natural behavior at the lower end of that range — soft, tannin-rich water is genuinely important for this fish.

Keep one male with one or two females. Due to its very small size, choose tankmates with extreme care — only the most peaceful nano fish are appropriate. Other nano apistogrammas, small pencilfish, or tiny rasboras make suitable companions. Avoid any fish large enough to view this species as prey.

Apistogrammas are cave-spawning dwarf cichlids. The female takes on all parental duties — she guards the eggs and fry aggressively while her body turns bright canary yellow as a warning signal. Males should be watched during this period as females may attack them to protect the spawn; providing sight-breaks with plants and décor helps reduce tension. Coconut caves, clay pots, or driftwood crevices all make excellent spawning sites. Fry are initially tiny and require infusoria or freshly hatched baby brine shrimp for their first meals. Apistogrammas are found in the leaf-litter zones of blackwater forest streams and require a well-decorated aquarium to feel secure and display their best color. A dark substrate, driftwood, leaf litter (Indian almond leaves are ideal), and dense planting around the edges with open sandy areas in the center replicates the natural habitat and dramatically reduces stress. Stressed apistos hide, fade in color, and become susceptible to disease. A comfortable apisto is a spectacular one.

Care & Ideal Parameters