koop171
here we go.
The tanks overflow (come back on that later 1) the water goes trough the pipes and comes in the spray bars, I made those spray bars to get the water as much as possible over the surface of the foam. The water goes trough the top layer of the foam. The top layer of the foam (1 of the 3) is above water this is kind of my "dry filter". The other 2 layers of foam are under water (my wet filter).
The filter foam is laying on the creates (Those red Coca Cola 8 x 2L bottle creates), in a few filter systems I used 4" pipes with holes that they use for drainage to put the foam on. Because I ran out of free creates lol.
I put the foam on the creates and pipes to get a space under the foam (come back to that too 2).
So the water goes trough the top layer of foam and trough the 2 layers of foam under water.
At the bottom of the filter is a pipe that brings the water to the pump under the rack, the pump pumps the water to the tanks and (1) the tanks overflow.
Okay the space under the foam I made with the creates and pipes I did for a reason (as everything I do lol) (2)
The pump, that brings the water back to the tanks, is on one side of the filter system at the other short side of the filter system is the refill point for the filter system. If I do a water change I just change 2 valves, I close the valve to the tanks and open the one to the drain, so the pump that normal brings the water to the tanks, pumps it now to the drain.
Most of the dirt in the filter ends up in the open space under the foam. Most of the dirt goes with the water, trough the pump into the drain.
Now there is always some dirt left, before we refill the filter system again, we "flush" the system a few times, that means we open the REFILL for 10 seconds at the other side of the filter and the water flows trough the open space from the refill side to the pump side of the filter system, taking all the dirt with it. If this is done, we refill the filter again, switch the valves again and did the water change.
The refill:
In the fish rooms we've 2 water storages, one is 4 x 250 gallon the other is 8 x 250 gallon, those tanks get filled overnight with straight tap water, we only put in Chloram-X powder.
Those 4 and 8 storage tanks are all connected, in the middle is a 5,000 gallon/hour pump that circulates the water in those storage tanks.
If we need water to refill the filter systems, I switch 2 valves, close the one that pumps the water back to the storage tanks and open the one that's going to the filter systems and the water goes with 5,000 gallon/hour to the filter systems.
It takes me aprox. 1 hour to do a water change of 20 - 30% this way on 10 systems without even touching the water.
If this doesn't make it clear...................I don't know lol
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