I'm looking to purchase an Ecotech battery backup and booster for my S2 return pump but have a few questions. Does anyone else have their return pump connected or just the powerheads? I'd prefer to run just the powerheads but I have neros and they wont connect, but I do have a radion light so can you also connect that and is it necessary? Also if you do run the return and have a reefmat it's going to overflow, so does this effect the waterflow at all? TIA