Satherodon mossambicus (Tilapia) are another alternative.
A colony of 1m/2-3 females will produce plenty of fry. They're mouthbrooders so you'll need to strip and grow out the fry to a couple of inches.
A colony of 1m/2-3 females will produce plenty of fry. They're mouthbrooders so you'll need to strip and grow out the fry to a couple of inches.