Hi
Have checked those out but all seem too complicated .lol The one I used before used a gravity fed siphon attached to the toilet tank Was fully automatic and required no pumps . While it did change the water did nothing for the gravel which is where the "purge" system comes in. By elevating the gravel bed it allows the filtered water to be returned Under the gravel. Of course what this does is setup a reverse flow UGF and also a "plenum". On my previous setups the flow was not strong enough nor were there enough ways to alter the flow path. Though it did go a LONG way in keeping the gravel clean as well as siphoning mulm from under the plates . Did not run long enough to see how effective as a Nitrate filter But in this case the reservoir will serve as a "veggie" filter which IMO is far more effective at nitrate removal. But my main theory of filtation is to remove the contaminates rather than alter them.
Since this tank will have rocks as the main decoration I feel that I can really step up the flow rates making a far more effective purge . Anyway thanks for the help!!! gary
Have checked those out but all seem too complicated .lol The one I used before used a gravity fed siphon attached to the toilet tank Was fully automatic and required no pumps . While it did change the water did nothing for the gravel which is where the "purge" system comes in. By elevating the gravel bed it allows the filtered water to be returned Under the gravel. Of course what this does is setup a reverse flow UGF and also a "plenum". On my previous setups the flow was not strong enough nor were there enough ways to alter the flow path. Though it did go a LONG way in keeping the gravel clean as well as siphoning mulm from under the plates . Did not run long enough to see how effective as a Nitrate filter But in this case the reservoir will serve as a "veggie" filter which IMO is far more effective at nitrate removal. But my main theory of filtation is to remove the contaminates rather than alter them.
Since this tank will have rocks as the main decoration I feel that I can really step up the flow rates making a far more effective purge . Anyway thanks for the help!!! gary