I have got the filter now, and have it running in my main tank. Am picking up the tank on sunday, and the heater is on its way i hope. I will be adding a diy canister filter made with a 1L container and a 220Lph pump after a week or 2 aswell. Where would be the best place to get some light coloured sandy substrate? And what would be the best filter media for my diy canister filter?