Is one hydra 52 enough for sps .....over a 90 gallon 48 inch tank?
Nah man you'd be okay if you stuck them underneath the light but it wouldnt cover the whole tank. You would have to raise the light very high to get it to spread that far and doing so would kill off the par rating when it hits the water. I juts set up 3 26's over my 48inch tank and that will do the job no problems.