I agree with Addy. Many people don't realize how important a nice blanket of algae along the sides of the pond and any plant containers is because it helps to remove toxins from the water.
A good bio-filter is the answer and I don't encase my pump with foam or quilting baton. I make a little cage that I put around the intake of the filter so that the debris that is at the bottom will eventually break down enough so that hopefully, it will find it's way into the pump, up the hose and then to the filter where it will be trapped at the top for easy cleaning. It also keeps my little fish from being sucked up.
Your's Koily, Lorraine
A good bio-filter is the answer and I don't encase my pump with foam or quilting baton. I make a little cage that I put around the intake of the filter so that the debris that is at the bottom will eventually break down enough so that hopefully, it will find it's way into the pump, up the hose and then to the filter where it will be trapped at the top for easy cleaning. It also keeps my little fish from being sucked up.
Your's Koily, Lorraine