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Old 19-10-2010, 05:46 PM   #7
kpchua's Avatar
Join Date: Dec 2009
Posts: 234

I believed in biological filtration to get rid of ammonia and nitrate. Normally ammonia spike can be reduced through large WC like 40%. However I had previously suffered a bio crash and ammonia spike remained high despite WC for 2 weeks, so no choice but to deployed zeolite to get it down as well as for the bio filter to cycle back. Zeolite is then removed.
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