Also hate to be another bearer of bad news.
when you are re setting the tank, flip the blocks so the holes are pointing up and down not side to side. Blocks are designed to hold lots of weight when stacked properly. But the way the blocks are stacked right now are significantly weaker than they should be. I have seen cinder blocks destroyed from being stacked this way when I used to do masonry work.
it sucks because it is a lot of work but it’s better to be safe than sorry.