Just bought the sunsun 302 pro kit, can I put the trays back in wrong? I'm seeing sand come out the out take sometimes when a Cory is over by it. Wondering if the filter trays go in a certain way, I have the holes lined up all the way to the lid. Can I have them turned wrong? My water I still cloudy and I am not sure if it's from the two white rocks I added last week or from fresh planting. Either way its been cloudy for a few days now and I installed the new filter last night. It has been running for around 8 hours, the water is clear of the particles that were in last night but still cloudy. Any insight on this?