Fatih,
Good to see you are keeping at it and if you persist you will figure out what will work for you with what you have to work with. Been there done that! Don't give up!
In the mean time read as much as you can on the Internet and books on what others do, and have done, so you can take something away from them or improve on it.
Remember the concept of keeping fish alive and growing in a tank is actually quite simple:
1. Good quality water to start with and for makeup water.
2. Sufficient oxygen
3. A way to remove both suspended waste and setteable waste on a regular basis.
4. A surface area for aerobic bacteria to grow on to oxidize the ammonia that is given off by the fishes gills and excretement.
As far as your pipe not handling all the flow -- been there done that! Upgraded to a two inch pipe (50.8 mm) from a 1.5 (38.2 mm) for the overflow from my media bed barrels as the media, although hollow, was blocking the screened exit pipe just enough to back up water.
I have found 2 inch (50.8 mm) the best size for all my unpressurized flow, and 3 inch (76.2 mm) the best size for my center drain and external standpipe.
To drain my clarifier tank I use 1.5 inch (38.2 mm)plastic hose. To pump water from the the top of my clarifier to the bottom of my biofilter tank I use 1 inch hose. (25.4 mm)
All my airlines are 1/2 inch hose. (12.7 mm)
Last edited by Cecil Baird1; 10/12/15 05:12 PM.
