you need a pump in the top off res that has a tube to lift up the water as your water level drops.And yes you absolutely need one in the top off res.No oxygenated water in a top off res is really bad about breeding bad bacteria and all your doing is filling your system with it.I got my pumps from walmart for 14 dollars a piece.I put hydroguard in it at 2 ML per gallon and it will usually build up a very nice colony within a couple days.I mark on my board whenever i add to the system which is once a week.
Once you put the filter in the top off res you will see the bad bacteria on the blue filter and after you clean it as every day goes by you will see less and less.My top off res stays sparkly clean now like a mountain creek.I use to use air stones but the filter works better and adds more DO to the water.
okay i will look into this.
and i wanted to clarify because i misrepresented some information earlier. i was trying to convey thats how i WILL be using my top off reservoir but to be clear, since i am only on about day 15, i have not used my top off reservoir in the way that i mentioned because they have not been drinking that much water. this week was when i planned on utilizing it that way. sorry for the confusion. i only correct myself so as to not misguide you on what might be going on with my roots. my roots for plants 7-12 in my second six site look better i will post pictures tonight or tomorrow. the roots in my first six site definitely all seem to be affected equally.
at what point should i consider adding something additional like great white or voodoo juice?