I dont have any sort of overflow but im hoping to install the one detailed by Covey on these forums (
http://www.3reef.com/forums/i-made-t...low-29396.html ). I hope it doesnt end up being too noisy
I havnt tried vacuuming the substrate but I think instead I will replace the crushed coral with sand. Ill get a few bucket loads from my local beach and replace it all within the week. Big job but I think itll be worth it
Thnx again peoples