EI dosing with water change twice a week
I have a 200 gallon that I am currently dosing with the EI regimen. I am dosing the amount for a 150 gallon. I know that EI usually involves a 50% water change once a week. However, I have been doing water changes twice a week because my water seems to get a yellow/brownish tint by the middle of the week. I have a feeling its due to tannins released from my ohko stone (clay not completely removed at the start). Anyways, would this mean I would have to double or at least increase the amount of ferts I dose each day to make up for the amount lost from the second water change?