I usually top off with adjusted H20 in the morn and just add some mad farmer or ph down
as needed.I dont add nute to every topoff, helps keep the ppm in line
Keep the ph below 6 but over 5.5 and you will need to adjust if the plant is
feeding,your ph will rise,I worry when my ph does not go up.Its a good idea to change your solution weekly so you know its always getting fed,as your solution will weaken rapidly mine are in 2 1/2 gal pots so this is easy:hippy: