I have central heating, I'm going to heat the tank with the miners, that's the main reason for the water cooling!
Since i already have the miners, i'm going to convert them: https://pt.aliexpress.com/item/4000369718539.html?spm=a2g0o.productlist.0.0.12b43a34hTKiiw&algo_pvid=96a6379b-2eb1-4768-8317-789126a2e4e2&algo_exp_id=96a6379b-2eb1-4768-8317-789126a2e4e2-2&pdp_ext_f=%7B%22sku_id%22%3A%2210000013334182814%22%7D&pdp_pi=-1%3B42.77%3B-1%3B18.12%40salePrice%3BEUR%3Bsearch-mainSearch

I can get away with 7 coolers, join 6 hash boards on a single controler