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I am new to this forum, i am planning to set 50 gallon Fw aquarium for discus fish, as discus needs more of stable and less flow in aquarium, adding like 250 gph flow would create heavy turbulance in aquarium, wanted to know can we reduce flow thru the screen? if yes how much flow i can add in 50 gallon aquarium.
Deepesh
Scrubbers need rapid, THIN flow.
But, you are going to have the scrubber flow into your display?
no i am going to have scrubber in my sump, i have drilled hole in tank for it. can i slow down the flow?
Overflow or pump feed?
overflow from tank which has drilled hole and water is returned back to tank by pump. i think the overflow is desighed in such a way that it can handle heavy flow without any problem.
Slow the flow down to the way you want it. Then:
Determine how much flow you have to work with. You have to start from there, and size your screen accordingly. The flow you'll get to the screen will be what's going through your overflow now. This is easy to figure out by counting how many seconds it takes your overflow to fill a one-gallon jug:
60 seconds = 60 gph
30 seconds = 120 gph
15 seconds = 240 gph
10 seconds = 360 gph
8 seconds = 450 gph
5 seconds = 720 gph
Take this gph number that you end up with, and divide by 35, to get the number of inches wide the screen should be. For example, if your overflow was 240 gph, then divide this by 35 to get 6.8 (or just say 7) inches. So your screen should be 7 inches wide. Here is a chart:
Screen Width-----Gallons Per Hour (GPH)
1" 35
2" 70
3" 105
4" 140
5" 175
6" 210
7" 245
8" 280
9" 315
10" 350
11" 385
12" 420
13" 455
14" 490
15" 525
16" 560
17" 595
18" 630
19" 665
20" 700
How tall should the screen it be? That is determined by how much screen area you need, which is determined by how many gallons you have. Try to get one square inch of screen (lit both sides) for every gallon. If lit on only one side, double the screen area.
When finished, this is how you want your flow to look off the bottom of the screen:
http://www.radio-media.com/fish/UserZennzzoOnMFK-05.jpg