I would get rid of that filter and go canister... but that's my opinion, I like canister filters and I have found that overkill is good for a marine system. I do battle with green hair algae but it is getting less and less as time goes on.
as for light bulbs you should change them every 6 months if they are florescents wether they are burnt out or not.... as they are used they diminish in intensity gradually and you won't notice it until you put in a new bulb.
I love my cannister filters, and wouldn't even think about using a little aqua clear on a marine system. that's just my opinion though. like I said earlier on my 10G nano I run a fluval 404 (which is for a 100G tank, so they say)
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80g
fluval FX5
(2) 300 watt tronic heaters
T5HO dual ballast lighting (power glo, marine glo)
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10G Nano
Fluval 404
power glo
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