Well there is only one pump, which is my old grundfoss central heating pump that I have managed to repair!
That one pump is actually powering those two external filters, it also powers 10 individual 6mm water feeds that go to varouse spots.
One filter goes to a water fall that cascades down the left hand tree the other filter feeds a drip wall.
The sump has a heater and a top up valve, at the moment there is also a feed simply recycling the sump water but it will eventually go to a trickle tower.
The thing is my pump, on its low setting, produces 2000 lph and it works at a very high pressure too. So I have had to use up some flow by recycling.
I would prefer two or even three smaller separate pumps, but every other pump I have tried makes too much noise.
The tank is in a place where I like to read and get away from my hectic household, so a quiet pump is important to me.
I have ordered a few more plants to try out, they should be here soon....