Topping off my rez

the solution left in my rez when my table floods is so low i am afraid the pump could overheat...the bottom half of the pump is still submerged and the intake still has water, but that just seems to risky for me.

i topped it off with nute solution, and now i am wondering, can i just always top off my rez when it gets low, or do u need to change the water because the plants will use most of the nutes

Top of ur res as need and then ph the water. Keep track of how much u top it off with. Once u've topped it off with 1/2 of ur res volume, replace it. So if ur res is 12 gals, change it after u've topped it up with 6gals. Or 2 weeks, which ever comes first

your talking about topping it off with nutes right

Wtf? I posted twice cuz I reread ur OP and saw that u topped with nute water. U jus top with plain water. The plant intakes more water then nutes. Ur ppm will be higher then ur original ppm reading as ur res gets low so u top off to keep ur ppm corect. Ur solution should have enuff nutes in it to last an ez 2 weeks. So jus top with plain water and change after u replace 1/2 of it. Make sure to PH after top up. Since u added more nutes, keep a close eye on it and dump it as soon as u see signs of burn. U may be fine u may not. Depends on ur strain as well as ur mixtures strength.

oh ok.. well im sure its fine cuz i am still only using half strength solution...and it is a 20 gallon rez(not as drastic of a change).. i only added 1 gallon

Well then I'm sure ull be fine. Just keep track of how many u put in. 9 more and u need a soup change