Ok, so my fry looked like they really needed a filter in their tank (and after leaving this on overnight look so much better) but I couldn't find a sponge filter without ordering online and waiting for shipping. So I innovated. I took one of my medium size whisper 100 bags with no carbon but the clip, and wiggled some material out from under the clip (ruined one bag in the process). I then inserted the intake tube for my Aqueon 10, the filter for the 10g. I set it up and watched for a few minutes and no fry got in the whisper bag. What do you guys think of all this? I think this really worked well, because my fry (~20 guppy fry) used to always stay at the top of the tank, but now they are swimming around a lot more and enjoying there habitat. The heater also seems to be working better because water is being set more near the heater. The current as the water comes out from the top (100gph) seems to be a little strong for them but they seem pretty fine. Also there food (hikari first bites) some of it stays at the top which is moved around by the filter, but I can work on fixing that. My only question (for now) is can I put some absorbed carbon in the filter bag even though it'll be directly in the water without being separated via. filter to help clean water some more? I'll try to include some pictures soon. Try to share any opinions and thanks!