• Vanessa

Gregory

Hello, Slava! In my opinion, this current is sufficient for now... the main thing is to direct it correctly... Here’s one option - the pumps should be placed in the far corners at the back wall and blow towards the front glass at an angle of about 30-45 degrees, directed towards the center, with a depth of about 10-15 cm from the surface. Instead of one of the pumps, a return from the sump can be used. With this arrangement, the rocks will be blown by a softer reflected current, which the animals like.

Karen81

And what about the flow behind the stones? There, it seems to me, a stagnant zone is formed. Or the stones should be placed tightly against the wall.

Christopher1774

You can also place the pump behind the stones; it all depends on how they are arranged. If they form a solid wall along the back, it probably makes sense. For example, I have the stones stacked in two isolated piles, and there is no need to specially blow air on them with pumps.

Vanessa

Glory, I don't have any additional flow behind the stones, they are not a solid wall, but a very "leaky structure" that ventilates well... there's no need to be afraid of stagnant areas...