I'm currently setting up my 10 gallon for my Betta boys, and was wondering about filters. I wasn't planning on using one, as I really don't have the time or money (test kits) to cycle. Yes, I know that sounds bad, but I'm putting my money into plants, a heater, and such. If I get a small sponge filter, will I need to cycle? I don't want to put undue stress on the fish, and if a small filter requires a cycle, I will just do frequent water changes. Either way, my fish will have clean water, so don't worry. I just need this question answered. Thanks!