PineSong Posted May 19, 2022 Share Posted May 19, 2022 So, I remember someone showed their stock tank with a hole in it stuffed with sponge filter sponge, so that water can drain out without losing fish or fry... but I'm not sure how the holes got put in? Do I just use a drill, or ? If you've made your own overflow protection, please advise! Thanks in advance! Link to comment Share on other sites More sharing options...
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