I'm not sure how Aquarium Systems fit in the ratings spectrum but generally I've heard good things about Salifert, also but to a smaller degree Seachem. I used Seachem for many years until they changed their reagents and it became impossible to read (far too dim of a colour tint), so I switched to Salifert and have been very happy with those.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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