I'd scrub a day or two before the wc. Let the sock grab it all. If you have a canister filter handy hook it up with just floss.
Your never going to get it all out. But if you can get a big chunk gone you can retest the po4( like removing gfo )to see what the tank actually has
But you did test po4 before the algae came in correct ? You would have seen a problem then. I.e. Leaching.
Your never going to get it all out. But if you can get a big chunk gone you can retest the po4( like removing gfo )to see what the tank actually has
But you did test po4 before the algae came in correct ? You would have seen a problem then. I.e. Leaching.