you know there's too much Ca how? he/she hasn't given us his exact nute regimen, just the end EC value. without a nute calculator, how do you know how many ppms of Ca are present?
I'd drain in mate, and start with a fresh batch with a low ec. . 8 ec I go for my gg in veg, some strains need higher, read your plants. I get lock out any higher. Rdwc plants have easy access to nutes, no need for high ec, does more harm than good.