I keep lots of SPS in my 20g. I think the biggest problem is keeping everything stable, as this is harder to accomplish in a smaller system.
Basically.. I keep millepora, digitata, various acros, and they are all lit under my 150w HQI . I have had great success so far.. everything colours up great and grows wonderfully.
I do weekly water changes of about 2.5g . I top-up every second day, sometimes that changes though.. just depends. I dose calcium and alk. and that's about it. I am fugeless and sumpless.
Heh, you'll all think less of me, but I have had such great success so far with SPS.. and I keep 4 fish in my 20g. Some acros do not thrive though. But most do... it depends on the species I suppose.
Anything I forgot , just let me know... HTH
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20g BB Mixed Reef // Coralife 150w HQI // AquaC Nano // Koralia 1 & Seio 820 // Jager 200w // AC50
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