I'm using activated carbon to help clear up some brown water. Did a 15-20%
water change, added a carbon filter pad and a quart container of carbon. Put
the carbon to two separate homemade stocking bags. One on top of filter
where water trickles over it and the other directly in the pond.

The pond is about 1200 gallaons. I have no idea what the correct amount of
carbon is, but since I paid $13 for the quart and 10 for the filter, I
figured it had to be enough. the pet store says to replace both filter and
carbon each month. Are they trying to take me for a ride?
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