blueberry 11 days in 1st time hydro. how they doing???

so this is my first time at hydro and have went with the wilma big 4 pot i have 4 blueberry clones that have been in the system 11 days now, heres a few pics can yous please tell me if they are growing at a steady rate or should be faster or anything all comments welcome need as much help as possible

Ph for that stage should he 5.6-5.8. You will see them get more green when u drop it.

ok it does stay inbetween 5.5 and 6 usually, i just added tap water tho aswell before the pic was taking so might need to settle a bit more