Ok...good to hear. :thumbsup: I would add RO water to dilute things down (stay under 450 for now....adjust ph after adding) and you can change the rez in 3-4 days and up things by a hundred (50/50 of each) etc etc...and simply watch them. If that's too fast just dilute things back for a bit.

Realize that even though the numbers seem "stagnant" to you we are no longer sure what those numbers are. The plants are drinking water and taking up what they need so all we are seeing here is what is left......and really.....that could be anything. (Remember your tap water at 400ppm? How much of our number would that crud be taking up? ) We can only see the TOTAL number....not how much of what nute/mineral of each there is. This is where balance and ratios come in to play for me and frequent rez change are a good way to make sure those two things stay that way.....especially when you have young plants.

I would just add your nutes etc....then adjust ph very last. So many things will change your ph that you'd be readjusting it nine million times if you didn't.

PS....checking and adjusting ph twice a day is fairly standard practice in hydro so sounds like all is good there. As the plants grow and you are using larger amounts of nutes your ph will remain more stable due to the buffers in the nute solutions. But when they are small.....everything has to be watched and checked more often.