Sure enough, our reader was right. Our Aquaponics setup didn't need more plants --- it just needed a little more time. Six days after my previous test, I tested again...and found ammonia, nitrite, and nitrate levels were all close to 0. Success! Time to choose some Fish.
I've narrowed it down to three unlikely-to-fail options. Perhaps those of you with more Aquarium experience can chime in?
Option A: 4 Danios. I understand this might be pushing the limits of my ten-gallon aquarium, but I might get away with it if I choose short-finned varieties that are less likely to be picked on. Danios are reported to be fast swimmers who enjoy dancing around the upper limits of the tank.
Option B: Three guppies (two females and a male) and three dwarf cory catfish. This would be a busy tank since the guppies would breed (and then eat their babies) while the catfish would play around near the bottom. Downside --- I might need to change out my existing gravel bottom for sand for the sake of the catfishs' tender mouths. And will I fall into the trap of trying to give all those baby fish away?
Option C: A single betta for peak beauty (although lower activity levels). Possible problem --- the beta's beautiful fins and tail might get caught in the intake of the pump since the species isn't good at handling rapidly moving water.
What do you think?
Choosing easy fish for a beginner aquaponics aquarium
"The nitrite level suggests the tank is not yet completely cycled." --- ScottS