Has anybody tried this product. Just saw it on BRS and price isn't all that different than Reef Crystals considering it treats 270 gallons of water per box  ($75 on sale at BRS) versus your normal box of 200 gallons. (I hope my math is right, I just did some Jeffro Bodine cyphering in my head). Anybody?
	
		
			
		
		
	
			
			
					
				