Ive come to the conclusion that i also dont want to setup the new tank untill i find out what went wrong with the LR in the 75 so i dont have the same problem.
This is absolutely the best course of action. Trying cleaners of various sorts is only an expensive way to treat the symptoms and not the cause. If you go that route, you will be stuck in a cycle that will drive you crazy. A herd of cleaners could wipe out all your algae....but then will die back from a lack of food. Back comes all the hair algae because the cause is still there (and so on and so forth).
Did you get the results of your water test? I think you would see a remarkable difference if you switched to RO
water. They units are cheap enough on Ebay these days to handle most home aquariums. I used to use tapwater, but have seen a remarkable improvement since switching to 100% RO
. I got a recent report from my water authority...it contained nitrates, lead, copper, and phosphates amongst a few other things. NONE of this is good for your tank (but great for algae!).
I can guarantee nitrates are up from using mechanical filtration as well. I would either switch to all liverock, or clean the filter media daily or at least several times a week.