I got a new 75gallon tank, i put Aquadurt.com black substrate in it. I put the lone ornament i want in it. and i put water in I was going to start cycling using one of my other HoB filters but it wont fit. the 2 filters i have ordered for this tank should be here monday and tuesday. Will it be okay if it sits for a couple days w/o a filter? no fish in it.