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I have 75 gallon and I’m guessing 70 lbs of live rock because in the beginning I had no idea what I was doing and listened to the lfs...I wanna take out 2 big rocks will it affect my parameters or any negative effects?
It is better than no guide at all and has worked every time have I have used it with the good rock you could get 15 years ago to CaribSea Liferock manmade stuff recently.Not all rocks are equal in terms of surface area for beneficial bacteria so a rule like "so many pounds per gallon" isn't much of a guide. I would remove what you want to with the option of adding some back or using a substitute medium if by some strange chance your nitrate, etc. increases significantly.
I try to keep mine off back tank walls for cleaning purposes, better circulation, etc.