So I was cleaning my tanks today and noticed a few fish were missing. I had 4 kuli loaches and thought they were hiding really good but after lifiting out the driftwood to clean the gravel i couldnt find them anywhere! was a bit shattered but finished the job then moved onto the canister filter to give it a rinse out and guess what i found! 3 of the 4 loaches hiding in there. i think the 4th might have had a run in with the impeller... i also found an rcs hiding in there. i have no idea how they made it into the filter as i have a block of foam stuffed in the pickup cage which works fine on my other tank for keeping the baby shrimp out. so might have to try something else.