is it ok to use a hang on back filter in a planted aquarium. i am currently using an emporer 280 ( it think its a 280 anyway) and a fluval 304 cannister filter. should i just get rid of the h.o.b. or can i continue to use both?
im not injecting c02 as of now but i was thinking about it. without injectin c02 willl there be any problems with c02 levels in the tank?