Your local plumbers merchant. You need a water tank of the "up in the loft" variety.
When you buy Methylene Chloride what type of container does it come in? That would be an indication of what you can safely use for the tank.
When you buy Methylene Chloride what type of container does it come in? That would be an indication of what you can safely use for the tank.
Search for "Oil Drums" on Ebay, a 205 litre (45 gall) drum is about 890mm (35ins) high and
590mm = (23ins) dia. Cut one in half and seal the filler hole will give your two tanks 18ins x 23 ins.
It may be worth investigating whether or not those blue barrels will resist meth chloride.