Reducing live rock

[TDG]

I have two 90 gallon reef tanks draining into a 100 gallon sump. The 90s are full of rock work and one of the 90s is starting to have algae issues. The tanks are 5 years old.

Would I do more harm than good if I removed some of the live rock, cleaned the algae off and place it in my sump (not back in the 90 gallon tanks)? I would like to free up more room in my 90s. Does live rock need a light source to be beneficial? The sump has no lights on it.

Thanks.

 

[Reefing Madness]

You could do that, as long as you didn't kill the bacteria in the rock, you could just give it a scrub down and throw it into the sump. you wouldn't need any light for it. Just do'nt dip it or let it dry out.
Adding a light to the sump and growing macro algae would more than likely keep it out of your main tanks.