11-25-2009, 08:08 PM
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I would be careful with a full blackout for a week. If this is your 32g under your "Aquariums", it has Hygrophila difformis (Wisteria) which needs light. After a week of no light it might not exist.
Interesting that I have this plant in my Asian 70g and it is covered with cyanobacteria. I know it is a balance thing, and I haven't yet finished the tank the way I want it, waiting for some plants I can't seem to find. Stuck six bunches of Wisteria in to get it going, and now it's a mess. The slime comes off easily with your fingers, so every week I take it all off, it sinks to the bottom, I syphon it out. Fine for 2-3 days, then I can see it coming back; course I don't get all of it. I'm OK with this for the present, until I get the plants and aquascape the way I want it. Then I will adjust the light period. This tank is getting too much light, 80 watts over a 70g, to balance the nutrients.