Originally Posted by syde
Hello, my 5 year old pond never cleared at first, I thought it was turbidity from 3 koi and probably 20 channel catfish. I'm starting to think that's not the case. Please recommend, what the problem is. Tannins maybe? I have to figure out how to add pictures... thanks

If you haven't done so already, read these 2 threads:

https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=124005#Post124005

and

https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=283542#Post283542

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