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40gallon breeder probably 10 inch apart I would guessIt would depend on spacing and coverage overlap. How big is the tank? How spaced out will the new lights be?
Don’t think you need 3 on a 40 breeder. Two should be fine.40gallon breeder probably 10 inch apart I would guess

Well I’m growing SPS and the shading that I’m already seeing is terrible so that’s why I have a 3rdDon’t think you need 3 on a 40 breeder. Two should be fine.
Sweeeeeet thanks man yeah I think it’llI just went to 3 primes on my 40 as of yesterday too! I just left them the same. The coverage from 3 is much better. Good choice![]()

