My 24g nano has 3 chambers in the back, the 1st chamber has 2 sponges in (fills it up), the 2nd has 1 sponge in the botton and filled up with Fluva bio rings and bio balls (I have removed the sponge in #2) and in the 3rd I have the std. 1100lph pump with a 150W heater. I bought a MJ 1200 to add for more filtration but after I installed it (3rd chamber) and turned it on it looked like I stuck the garden hose in the tank...way too strong, the sand was blowing all over the place so I turned it off. So that brings me here today, I would like to find out a better way to run 2 pumps and have it still have a sand bed left over...