Hi am new to the forum, and I have a 10 gallon aquarium filtered by a aquaclear with two female bettas and an applesnail. Im not really into this hobby but Im really starting to like it and I want to plant my 10 gallon tank, and maybe a 20 gallon for x-mas. Ive been reading most of the articles about cycling, pH and all that stuff. I recently learned that my bettas (and applesnail) breathe air directly. I also read that surface agitation produces oxygen for the fish, but since my fish breath air I dont need surface agitation? The guy at a fish store said no surface agitation wont harm the fish cause they breathe air, and no surface agitation is good because it keeps in the c02 for the plants. is this true? I really want to plant my tank but if no surface agitation will hurt the fish i wont do it. Thanks and yes I will be reseaching plant care 