CrayolaViolence
New member
I would like to add nitrate rock to my HOB octopus 1000 but I am not sure whether to put the rock where the bubbles come up through or to put it on the side where the water exits. If it's on the side the water won't pass "through" the rock, rather it will move around it, if I put it in the middle I will need larger rock so it won't fall through the small holes where the bubbles come through.
I'm assuming it would have to go on the side, where there is already a small bio sponge, and just "suck up" the nitrates as they come through the water.
I'm assuming it would have to go on the side, where there is already a small bio sponge, and just "suck up" the nitrates as they come through the water.