First happy news in a while. The tank seems to hold water. It has bin sitting since yesterday, and not a drop of water around the areas that have bin leaking. Where i did see drops under the tank, i just put another math of fiberglass over, and it was good, no leaks around there. What happened is that i must have bin doing a crappy jobb with laying epoxy in that area. With that said, i had never done it before this tank, and neither will i again(i think).. when that leak was fixed, it leaked in the backseam, between wall and floor, after looking very good with a flashlight i could find a tiny tiny tiny hole, i fint it hard to belive that the hole went straight through everything(I epoxy sparkeled all the seams), but still, it must have.. I fiberglassed the joint once more, and now i dont se any water.. At this time there has bin showing water for a while, so the fact that it doesnt now, is a good sign..
The fixes in itselfe has bin tiny, so i would absolutley recommend this way of approach to anyone building tanks like this.. The fixes was tiny, the motivation has bin the reason this took some time(and other stuff happening in my life offcourse)..
If it still holds tomorrow, its time for filtration and setup

Stay with me!