Richard Jepsen
Member
X-Tol is $18 for a 5 litre package at B&H, and generally not a lot more at other places.
If it only lasted the recommended 6 months, that is $3.60 per month.
Most of us regular users have no problem with X-Tol lasting much longer than that. 12 months is generally not a problem. That is $1.80 per month.
If you aren't using up 5 litres in e.g., a year, then any you decide to discard won't have cost you much money. And environmentally speaking, discarded X-Tol has very little impact.
Unopened packages will generally last a very long time, so the best practice is to buy two packets, mix up one, and have the second ready for mixing when you need it. And 5 litres of liquid takes less storage space than you might expect.
There are other reasons to consider other developers, but wastage of unused developer is less meaningful with X-Tol than you might initially think.
Xtol can be stored in 1L plastic bottles and will keep for no less than 9 months if you use distilled water. I never can use 5L so I give 2L away.