1. What is the "sequestrant" that is to be added at the beginning of start up? Is that the actual name of the chemical that I would ask for at the pool store? (I assume the bottle will say how much to add per 1,000 gallons...)
2. Is it okay to be adding new DE to my filter each time I clean the grids during start up as psi raises due to the plaster dust in the filter?
I just want to make sure any possible DE in the water will not harm the new plaster, but I assume the filter will be pretty useless if there is no DE on the grids.