well what do you want to grow? If you're just wanting softies and a few lps, why bother w/mh imo. You could get by w/just 2x64 for all softies/some lps...
ya i have coralife 2x96 pc's but i want to try a clam so i think 150? would be enough light i love hello lights prices but they will not ship to canada
mmm...ask in the clam forum...2x96 (didnt realize those would fit a 20l???) may be enough for a derasa...at least a few people say that i can keep a derasa in my 40 breeder (a bit taller than yours) and i only have 4x96w pc's on there...
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