Way to go! Keep up the good work. Guppies are a very hardy fish (except in Montana in the Winter time --- I've killed a few hundred this past Winter) But they can surely provide you with a lot of ferts for your AP system! Sometimes, the fry will get pumped into the GBs, but I just leave 'em alone until they are big enough to catch .... they either live or die, and if they die, they provide more ferts for the system