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Originally Posted by daidevo ok thanks  so when I do a water change I just suck the water out right? | That's the beauty of the saltwater hobby. Not like freshwater which you have to vacuum the gravel. Quote: |
Originally Posted by daidevo what about the red algae that sometimes develops on the sand bed, do I just leave that alone? | I'm assuming that you are referring to red cyanobacteria or red hair algae. Don't leave it to thrive, you can stir the sand gently to bring it up and have it caught by the overflow and finally skimmed out.
For adding sand, just add it slowly and on top of the old SB. If you have sand stirrers, they will even out the sand bed and the new one should fully mix well.
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30g reef tank, CPR CY192 filter w/ DIY plumb running Rio 17HF return, Coralife 3x 9w UV Sterilizer, 3 24W T5-Helios 10K Daylights/3 24W T5-Helios Blue lights, 2 Logysis blue meteor light strobes (moonlights/24 Blue LEDs).
Tiger tail cuke, asst. snails/hermits, asst. feathers, rainbow acan,zoos,shrooms,bubble,galaxea, asst. shrimp, 2 ocellaris,mandarin,zebrasoma xanthurum,pink-spot watchman,red-striped pistol. | 
converting to a DSB? 
75 gall, 80 lbs sand, 110 lb lr, 10k pcs, atinics, emperor 400, prizm skimmer, hagen and maxi jet powerheads 
