yes im trying to cycle my tank i just learned about cycling a few weeks ago when i found this site my filters and my api master kit will be here tomorrow according to amazon tracking, i will be using 2 penguin aquarium power filter 350gph in my 48x15x16 50gallon tank. as of right now i put the seachem prime in the tank with the anglesplus active filter in the tank with a bubble hose in it, i put the seachem in last night, the filter got here today.