Coralgurls tank build 180 - it's ALIVE

[Coralgurl]

Well having a nice place to relax in front of the tank gives it a different perspective. Have noticed the tank isn't level anymore, water on one side is lower byat least 1/4". Tank runs across the joists and there's a beam just behind where it sits. Nothing noticeable changing in the floor, joists are good, no bending or warping. There's a post under the high side of the tank, do we need to reinforce the other?

The tank sits on carpet and the stand has adjustable feet for leveling. Any suggestions, concerns I should be looking for? Could this be the cause of my sump cracking? It's sits more towards the high side but only by 6".

Ideas?