here you go. ok, this is a skeletal view of abs or pvc, whichever you prefer, the water flows into, via oveflow, the 12" diameter pipe through the smaller pipe sticking out. then it falls down through course media, through the small connecting pipe into the bottom of the second 12" pipe and up through finer media. then it overflows into the third 12" pipe and falls onto the drip plate which disperses the water evenly over a bed of bio media, then when it reaches the bottom of the last cahmber it is pumped back into the main tank, i think that when i do it i will hook another pipe up to the exit one and extend it to the other end of the tank so that water isn't being redfiltered. to expose the bio media to air i will have multiple airstones jut above the pump, or have a pump that pumps more water than the amount that can flow into the system. this will keep the last chamber close to empty. my theory is that since air pumping through a pump lowers the gph then it will reach an equallibrium where there is a continuous and constant air flow through the pump. which will keep the bio media in the air. i will control inlet flow via a ball valve on the inlet pipe. the only drawback to overpump method is a continuous bubble flow into your tank. to fix that i will have a second de-bubble chamber at the end of the "transport" pipe at the opposite end of the tank as the main filter. this will be a 4" or so pipe with a t at the top, so air flows through the top of the t and water out the side, either through a diy spray bar or just straight in. in my tank, the 300 gallon diy, the filter will be all the way to one side, out of site, the the exit tube will run along the front under window level, out of sight then into the de-bubbler on the complete opposite side, out of site.
tell me how you guys think this will work and if you see any pobs.
tell me how you guys think this will work and if you see any pobs.
