Are there any potential problems with having a reserve reservoir with standing water for a quick change our

I bought 2 reservoirs, thinking I could have one ready to mix fresh nutes and swap to make cleaning less of a rush job. Is there any problems with having a spare with water sitting in it?

Thanks for reading my post!

Yes. Not good leavin standing water, its needs air stones to keep it oxygenated. Also if u mix it with nutes it wont last long. Maybe a week if u have air in it.
Best to mix as needed and ph just before giving it to ur plants.
Standing water causes bateria to form and grow, then can infect plants.


I agree, spare res is great. Just fill and mix solution when you plan to swap them out.