well my friend let me have a 10g tank that was in his garage for a couple of months and man its filthy!... it has gravel, orniments, filter, heater, powerhead.. i trashed the filter becuase it was nasty but the rest seams to be ok other then the algae thats on it. Well i spent well over 2 hours with a brush and hot water scurbing it to death thinking it was fine... i filled it up with water and man the water color was like yellow and smelled like the ocean!.. i obviously didnt use the tank.. i dumped out the water and its sitting in my garage now.. i dont know if i should just dump it or try to clean it.. any tips on how i can clean this tank?.. thanks