CPDs do well with scarlet badis in planted tanks. We keep them together here. Scarlet badis and CPDs can be picky at times with food. The ones we got here are trained to eat flakes but no nearly as readily as most tetras or rasboras.
How much/ what type of lighting are you keeping on the tank? CO2? I'd suggest lots of co2 and minimal but GOOD lighting. Let us know how we can help. We've made plenty of mistakes and would be happy to help you out avoiding them!
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