So I know there are a few people on this forum that run FX6s, do you also have sand for substrate in your tank? Recently I have started have noise issues with my FX6 and I'm pretty sure its because there is so much sand getting sucked into the canister and even into the impeller. This weekend I took the FX6 apart for the first time to clean out the motor and impeller and there was a decent amount of sand. There is always sand inside the FX6, quite a bit on the bottom. After I cleaned it out this weekend I put it back together and the noise started up again almost immediately. Does anyone else have a lot of sand getting into their FX6? I ordered a pre-filter sponge to try and prevent so much sand from getting into it but I'm afraid its going to get clogged really fast.