I used large decorative flower pots since my pond is only 500 gals. They just look like huge water features and you wouldn't even know they were a filter unless you got in there and really looked at it. I used elephant ears and some other big plants and it looks super natural now that it's...
Read up on skippy filters. I have a 10 year old pond that has never been clear until I put a skippy filter on it and it services 4 turtles and koi plus all the ducks drink and bathe in it. I would just double the size. If your pond size recommends 40 gal skippy I would use 2 - 40 gal filters to...