Pond filtration

[stinsman]

I had a "professional" put a pond in my backyard. By my estimates, it's about 600 gallons, concrete basin. The pump and filter are one unit, in-pond, inside a white bucket, with a PVC pipe connected to the outflow going to a waterfall.

It's time to change the filter and I'm wondering what I should put in it? I've been calling the guy who put it in and have received no responses, which is very frustating. :devil:

I realize I can just take it apart and look, but I'd rather have an idea of what I need first, so I have the supplies onhand. Any suggestions appreciated.

 

[KoiBOY]

It Proably Only Has Rock In A Mesh Bag & A Foam Pad As A Bio Filter Just Pull It Out And Was It But Make Sure You Use Pond Water Not Water Out Of You Garden Hose For The Clonien Will Kill The Good Bacteria