haze on clear plastic tub

[HelplessNewbie]

The walls of the clear plastic tub I was using for quarantine appears hazy. It coincided with the mystery snail temporarily moving in, which means I also added Seachem Equilibrium, baking soda and calcium carbonate over 2 weeks to raise the pH, GH and KH of my soft tap water. The haze will not easily rub off with a blade.

Now that the quarantine tub is empty, can someone suggest the cause and remedy for the haziness?

See photo for comparison.

[nabokovfan87]

Adding the equilibrium will make things a bit hazy.  It could be all you're seeing, but I can't say that with certainty.  I would simply soak it with a white vinegar dilution when everything is empty and try to clean it that way. 

I cant guarantee it will work for certain, but the vinegar should dissolve any water hardness residue.

[mynameisnobody]

Barkeepers Friend (powder form) will get it out with no issues. It’s plant based so is perfectly fine to use and I haven’t seen anything it can’t remove.