charlie has a weird obsession with sticking himself against the filter intake. he definitely does it on purpose and can get himself off of it with no problem. he gets quite angry if i unplug the filter to "un stick" him. however the intake is like a vent, and i've now noticed a small tear in his tail fin. i think sometimes his tail fin gets sucked in a bit ripping/tearing it. i have extra panty hose that i want to put around the intake to stop his fins from getting sucked in and its like extra filtration but i'm unsure of how to secure the panty hose. just wrap it around and tie a knot in the panty hose? cut the leg off and slip it underneath like putting a sock on your foot and secure it with yarn or maybe a zip tie? if i did that would the panty hose run? they already have a couple of runs in the thigh which is why they are extra haha. or is there something else i can do? also do i have to swish the panty hose in old take water occasionally like i do for the filter cartridge?