is it true that a low ph (which is why i have blue rams) will kill beneficial bacteria? my ph has naturally been at 6.0-6.2 since my tank has been set up so instead of fighting it, i chose fish that like a low ph however someone said that low ph kills beneficial bacteria. is this true? my water parameters are ammonia0, ph6.0, nitrite0, nitrate 10. i do water changes every 3rd day. i use seachem water conditioner and seachem stability with water changes. also use flourish excel for plants. 45 gal. coffee table aquarium. 53" long, 23" wide, approx. 12" deep. thanks