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Using RO water and potassium nitrate I've created a solution with help from James' Planted Tank calculator. I've made 100ml of solution for a 40L frag tank, so this should last me quite a while.
My question is how long will it keep for? My concern is that it settles out at the bottom, or loses potency. Is that a genuine issue, or will it be fine for years if I keep it in a cool dark place and just give it a good shake before using?
My question is how long will it keep for? My concern is that it settles out at the bottom, or loses potency. Is that a genuine issue, or will it be fine for years if I keep it in a cool dark place and just give it a good shake before using?