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 PH Monitor 
		
		
		I was wondering if anyone local had a PH monitor I could borrow for a short while?  I have a Hagen test kit but the colour keeps turning black and i'm pretty sure black is not an option on the PH meter.  My tank has developed a brown algae on the sand and on some of the corals as well since this morning.  I did a 20% water change yesterday and just used tap water with a dechlorination reagent.  Could this be the cause of the algae?  I tested all the parameters and they all seemed fine. 
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 how old is your tank? 
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 PH 
		
		
		The tank is about a year and a half old.  Everthing seems to be fine now though.  I added a Ph buffer and that fixed the problem.  Thanks. 
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 great 
		
		
		great!!! 
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