Planted Tank Guru
Join Date: Jul 2008
Location: Morris County, NJ
I would advise such a sudden increase. In general it is best to avoid sudden changes in a planted tank, as this can disrupt the balance and lead to issues. In this instance, your plants have been living with low nitrate levels for a while and likely don't have the enzymes and such to immediately start processing such a high concentration, so some may remain unused and in the water column, which in turn increases the likelihood of algae. It is best to always make changes slowly, to allow your plants to adjust.
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