My specs: 29 gal planted 1 powerhead pointed down toward gravel to keep water moving (I put this in after the first 3 got sick) ecocomplete substrate 2 20 watt aqua-glo bulbs driftwood deco rock 6 rainbows 2 otos temp: around 77 water parameters: amm-0; nitrite-0; nitrate- around 10; ph- around 7.8 ...