Hey guys......My fish BISON is a very aggressive one.He likes to eat and I feed him everyday.When it comes to feeding time he often gets feisty when I place the food on top of the water.I clean the whole jar once a week(Friday),but every Monday and Wednesday I clean it with the 20% method.The plant is going on nicely and it doesn't bother BISON at all,he swims so swiftly through the leaves.