Bump..
Ok so I had asked this question about sumps earlier, but Grins took me off topic (if you can blame me for the fish I can blame you for that

).. Anyway does anyone have experience with sumps, specific refugiums?
Her is the original question..
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Lets talk Sumps... Specifically Refugiums
I know they are mainly for the denitrification process.. However mine seems to be getting a combination of green and red slime on the walls of the refugium area.. In some areas I see the snails attacking it, in other areas they leave it alone. In fact the turbo seems to like chewing on the cheato more than doing his job. Do I need to put more snails in the refugium? I have 1 turbo and 4 Astreas. (this has changed I had two empty shells assuming the 1 blue legged hermit had dinner) Maybe I should put a crab or two more down there.
Is this area supposed to have algae growing in it? Or is it supposed to be clean and clear like the main tank?
I've looked on the net for pics, but only seem to find pictures of people setting them up, not pics of established systems.