What to use for "additional insulating material" in water table for a 65 amp plasma cutter

I’m setting up my Crossfire Pro and the instructions prompt me to use additional insulating material as the water table is designed for 45 amp and under plasma cutters. Thoughts on what to use?

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Hi welcome to the gang!. My first thought… May or may not work. Would a peice of one them welding blankets, ( I think thats what there called ) cut to fit ? Dont know if a peice under the slats would work? Just a thought.

Floor tiles???

Winging it, but what about a sacrificial sheet of steel under the slats with 1/2” or so of very coarse
sand added after replacing slats?

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I would use floor tiles, slice them narrow so they drop between the slats and let them rest on the bottom.
They are easy to cut and would last forever.

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If you use the floor tiles get the real ceramic ones, not the stick on kind and keep them as close to each other as you can.

I would just build a deeper water pan.

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Say what???

I use a 60amp everlast and I have no problem

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Thanks everyone for taking the time to respond.