I have 4 Angels in a 30 gallon tank that have just come into adulthood. One has taken charge of the tank and keeps the other 3 in the lower left back corner. I used to turn my canister filter off during feeding so they can come to the top and feed without the filter taking most of it. Now I have to leave the filter on so the food will swirl through the tank so the other can eat. Any suggestions?

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