You could get a small bloom but the chlorine in the tap water should kill it.
BTW if all you have on the tank is a rena I would recomend a AC110 to help oxygenate the water. I have seen tanks that won't clear up are cured with the adition of a HOB filter.
3 or 4 large yellow labs will get you on your way ...... nwhat are you going to be keeping in this tank?
I would just rinse the filter material in good hot tap water.
BTW if all you have on the tank is a rena I would recomend a AC110 to help oxygenate the water. I have seen tanks that won't clear up are cured with the adition of a HOB filter.
3 or 4 large yellow labs will get you on your way ...... nwhat are you going to be keeping in this tank?
I would just rinse the filter material in good hot tap water.