tank additives


The easiest way to remove suspended matter is to turn off all pumps and watermovers. Tank settles down quickly.
Aside from that, as stated, the tank water "polisher" is a hang on canister filter. Keep your pumps on during that treatment, though.
If you have a sump, run the drain water into a filter sock, if no sump a typical freshwater hang on tank filter will do.
Remember any type of mechanical filter requires regular maintenence (cleaning).
Avoid chemicals at all costs to clean the tank, in all circumstances, regarding everything!