there is a reason the tank makers say to level the tank and not being level will in most cases void the warranty. it is not hard to level any tank and it what should be done. not being level opens the door for a disaster and the larger the tank the more important it is. an un level tank can...
I have the same rodi unit I would start by replacing the membrane as in MHO I would not want someone's old one running in my tanks. I would then after replacing the membrane run it without any media in the unit to see if water is flowing through. that unit should run at about 80 psi one again...
there are many ways of keeping a reef tank. IMHO I would start with the largest tank you can afford and have room for. If you plan to be a reef keeper I would make sure it is a drilled tank. once again IMHO to upgrade the tank you now have will in the long run cost as much as getting a larger...
you may want to make sure your rodi is at zero tds. I would als test for silica as well as po. if any of those are to high it may mean your not using enough gfo or you skimmer may be to small for the tank may also not be enough water flow. IMHO always test first before making changes
it is possible that may be the case. They have also talked about allowing those who already have them to keep them. They may make it illegal to import or sell in any way. Including trade or sale among ourselves. Thee is a lot of debate about this and with election not far away it may become more...