If it started life as Sparex 2 and water, then the crystals are
merely solid sodium bisulphite. As the solution has been there for a
few months, even if it’s had the lid on, some of the water will have
Basically in any solution, you have a solvent (in this case water)
and a solute (in this case sodium bisulphite). When making up a
solution, solute is added to solvent and it dissolves. You can carry
on adding solute until the solvent can no longer hold any more of the
solute the solid particles start to settle to the bottom. At this
stage you have a saturated solution.
What you’ve got now is basically where enough water has evaporated
such that you have a saturated solution, but instead of the solute
molecules just settling out of solution, they are attracted to each
other and “grow” just like the crystal gardens in kids’ chemistry
sets. The reason that you get the growth of crystals is that the
liquid has been undisturbed, whereas if trying to make a saturated
solution, you are either stirring the solution to dissolve the
solute or just the mere action of adding the solute disturbs the
liquid enough so as to prohibit crystal growth.
They serve no purpose other than what it was originally sold for.
You should be able to add more water, switch it on and re-dissolve
Does this make sense?