Runtz and GMO Cookies in Hydro

So okay, this is the start of week 2 of plants life, as i stated in the previous week I bought a chiller with a compressor because the one that i bought previously did not work, so far had to change the bulkheads because of leaks and it seems that leaking just ended, so today i finally put some fresh water into the system and things look great. pH was 5.85, ppm 49, no juice is added yet, I'm suporting the humidity witha humidity dome over them and PPFD is 250-ish, can't adjust much, the lights i've got dont have a dimmer box , because of the lack of that some of the initial leaves did burn but eveythings nice so far. Will continue to update as I go, but for my first hydro I'm exhausted, learned a lot and wil continue to do so. Also!!!!, if someone comes by can anyone tell me WHY on earth one of my bucket fills more than the others??, i have 3 25w pumps, saame pumps distributing water and one of them is ALWAYS fuller than the others, ahd to adjust the knob that the pump has to level them out, and even after taht is not perfect.