I have a tank with about 700 liters of water and about 400kg of epsom salt (sulfate magnesium), the tank is about 2.2m x 1,1m and only 25 cm of water in height. Im using a sand filter (like the swimming pool ones) to filter the water, I want to add a uv sterilizer to kill germs and bacterias...
Hello
I built an underground room measuring 2,5m x 3m x 2,3 just below the ground, the walls are about 20cm thick in solid concrete, the ceiling has iron structure and semi hollow bricks in the concrete, the whole room is revested in ceramic and porcelain tiles inside, the entrance is a 80cm x...
