If you are paying for your water, then you might want to consider a RO unit that is low on water usage like this one, which will waste no water, so cost much less at the end:
http://www.costco.ca/Premier-Zro-Pur...100016456.html
If you are using tap water I would start with using RO. This is probably your problem.
Quote:
Originally Posted by ChizerBunoi
I am going to buy a RODI unit from BRS. Just looking at the cost of RO in my city, it's going to be $40 just to do a 40 gallon water change. That's not including the ATO water of 15 gallons a week.
Also going to try some BRS GFO in a media bag, in my filter sock. But I'll put it on the output of my protein skimmer.
I really want to get a way from carbon dosing entirely. It's scaring me off. 
I am thinking it was a combination of ALK ( initially at 7 and then I slowly raised it to 8), and bad water quality. Lesson learnt, listen to people's advice as they have been there, done that.
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