The foam or bubbles that are on the surface of your pond are caused by high levels of phosphorous in the water. Here is a great Q & A we did back in May on the subject.

Reducing Foam Buildup

Hopefully this helps you!

This should help you get on the right track.

Hope this helps!

Thanks for your interest! Catfish in particular are bottom feeders. Typically they respond well to live bait (the ‘ole hook & work works great). Set yourself up a couple poles and cast out a large hook with a generous “gob” of worms, with a fairly heavy sinker about a foot above the hook. This will get the bait to the bottom to catch the catfish. Small hooks and small worms suspended under a bobber work best for bluegill/bass. It will take quite a bit of fishing to remove the fish, and once you have, you’ll still have to work on it every now and then since fish tend to travel to every water body via a number of methods.

Hope this helps!

Its difficult once they are in there, one way is to try and fish them out. This is a long process but overtime you can minimize the population.

There is one way to start out fresh, but unfortunately it isn’t specie specific. It would basically wipe out the pond to start fresh. If you ever wanted to start out with a fresh pond, you could use a product called rotenone.

Unfortunately, when koi or catfish cause cloudiness issues it isn’t the easiest to fix.

Good question, goldfish and koi are two different things. You can read a little bit more about the differences in my last post called “Telling the Difference Between Koi & Goldfish”.

Having nine 6″ koi in a 200 gallon pond is definitely a cause for an algae bloom. You can do a water change, but that really isn’t as detrimental as making sure you have adequate filtration or reducing the fish load that you have.

To remove dead leaves off of the bottom, you can either use a Pond Vacuum to help vacuum them off the bottom or you can use natural bacteria’s such as Muck Defense to help break down the leaves.

Hope these answer your questions. Another question for you, do you have any water hyacinths in your pond? That would help also since aquatic plants will compete for the same food source as algae.