Jeff_F Posted August 20, 2023 Share Posted August 20, 2023 I've started to see these holes and am wondering if it is a potassium issue? They are not small pin-head size holes so I'm not sure. Is it potassium or is it from the fish chewing on the plant leaves? I fertilize with 3 ml APT 3 Complete at 3 ml daily in a 20 gallon tank. This is the only plant in the tank that has this issue. I know that a Java Fern likes a lot of potassium yet it seems fine. Link to comment Share on other sites More sharing options...
JE47 Posted August 20, 2023 Share Posted August 20, 2023 What kind of fish do you have that might chew holes in a plant? Link to comment Share on other sites More sharing options...
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