What do you think?

[scales and tails]

Ok so the tank is comming its 1500-2000 gallons wondering what to line the inside of the block with we are going to parge it. We have d one this with 7 koi tanks and it has been working fine for years. But i have been reading on this blueseal coating it says its non toxic and dries to an ocean blue finish ever tried it what do you guys think? www.bluesealwaterproofing.com