The plants handled the topping from last week with no problem. I decided to go a little crazy and topped the fast growing plants 6 more times. Just wanted to see what would happen with a lot of tops and a long veg. I left the slow grower (bottom right) with just a single top as a control. I started to add silica and some nitro, along with the double dose of cal mag. I think they will need a good amount of cal/mag for the rest of the grow . My previous grows never needed cal/mag, and I thought it was the most over recommended nute, now my plants NEED it. So far so good though.