Cleaning a tank with malachite green

[Giuseppe]

I want to begin preparing a 29 gallon tank for 2 juvi axolotls to live in. The problem is this tank was previously a hospital tank for a set of angel fish with a fungal disease, so it was continuously full of malachite green. It's my understanding that treatments like that are highly toxic to an axi, and I also don't want them to contract a fungal disease. What's the best way to clean this tank to make it safe for axolotl? Or is it just too risky? So far I was thinking several water/vinegar rinses and then several with very hot water being sure to scrub the whole tank.

 

[Autistic Catholic]

You could also use bleach but you'll have to let it evaporate for several weeks and then check the water using a plant or a snail to ensure there are no more bleach residues. How are the axies now?