Cart for my hyd power unit

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KBS aquaclean

That product is pricey. I see the MSDS has three ingredients:
Potassium Hydroxide
Ethylene glycol monobutyl ether
4-nonylphenol branched ethoxylated

So lye, and two other ingredients are surfactants and solvents.
The KBS web site indicates the product is eco safe. But you clearly have to worry about toxicity and skin damage.
The 3rd ingredient, the EU has flagged dangerous to the aquatic environment and regulates its use (first hits when doing a search). You can buy lye, but the other two are industrial sales only. Appear to be Dow Chemicals products, that comes up in a search. So the price is warranted by these ingredients not being common nor cheap to buy by anyone.
You swear by KBS products, so $18/liter must be worth it. I'm guessing you stock pile the 15liter jug.

So when I searched for KBS Aquaclean, it must have brought up an Australian web site of theirs, using the link in your tag line brings up a much better price of $22/gal.