Hi guys. I want to ask you guys a question. It is been a while since i kept a fish. Now i want to try using a substrate like sand or amazon soil or somethings like that without using real plants. I am using 60cm x 40 cm x 40 cm and using a internal filter ( it is a chinese brand call boyu, perhaps some of you guys from asia will recognize it)with double canister. If i am using the substrate, will the current from my filter blow my sand all the time or is it okay to use substrate? Thanks