I assume you mean the sponge covering the intake? Yes, you can use a nylon cut to size and rubber banded over the intake. Don't double it over too many times though or it'll slow the flow too much and block up quickly. I tried using one of those ankle high nylons to cover the intake once, and it needed cleaning too often and slowed the flow rate down too much. I'd just do a single layer.Very nice, thank you! Right now my ammonia and nitrites are 0, but my nitrates have climbed in the past 2 weeks. I also attribute my algae bloom to the nitrate, so live plants can’t come soon enough. It’s around 30, so I do 40% water changes every 2-3 days, because of my work schedule. Pretty easy in a tank this size. Could I replace the sponge with a nylon (from a knee-high)? Only because of the unsightlyness of the sponge?
Now one of mine is covered with an old fish net. I just cut the netting off an old spare fish net and rubber banded it over, works perfectly
Great that ammonia and nitrites are at zero, that's where we want 'em! Nitrates do build up quickly in a small tank I'm afraid, just the nature of dilution. But plants do help a lot. And yes, at least it's easy to do water changes on a small tank! lol