Hey guys, some questions on issues I am having with my tank. About 2 months ago I moved a tank that had been established for 4 plus years. I was able to move all my fish and zoa ....live rock with no loss. So was very excited about that. I did however end up replacing about 60 percent of my water of a 90 gallon tank and also removed some of my live rock to create a better rockscape for future coral. I have been doing quite a few water changes and cannot get my nitrates below 20 ppm and struggling to get my PH over 8. I have done quite a few substrate cleaning with a vac and almost always get quite a bit of detrius as well as my filter sock will turn brown in about a week after cleaning. Alkalinity is also low at 6.5 and will probably start trying to dose with baking soda to raise it. All other parameters are in good shape and my fish etc all seem to be doing pretty good but I know to add coral I have to have better parameters. Something is off I am just not sure what it is....looking for any thoughts on what I need to tweak here. thank you!