The FC- TC = FC + CC, so you have 4.5 CC, which is bad- the FC will gradually eat the algae and oxydize the CC, that's why you need to keep at it!
The FC- TC = FC + CC, so you have 4.5 CC, which is bad- the FC will gradually eat the algae and oxydize the CC, that's why you need to keep at it!
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