Silica blast can cause some ph swing. So try to use small amounts and sparingly. Just not sure how it does with the Ph perfect since it's very alkaline and will raise Ph. Personally I like about 600 ppm at this point but your plants don't seem to be complaining so just keep at it!They may be on cruise control for now but I'm sure keeping an eye on them. I saw a little burn on one of Dee's shoots last evening. The only thing that was new was I had added Silica Blast ... I did a deep flush and they are looking good. I'm wondering if I gave it to them too early. That was the only plant that seemed to mind.
I'm running my nutes at about 800 ppm and using PH Perfect CoCo so do keep an eye on the PH. I've also been adding Cal-Mag with each water.