Anyone tried using an acrylic fortifier in the cement? I used this stuff instead of water when mixing the grout for my kitchen's tile floor to prevent the grout from staining. Seems to be working really well. Supposedly makes concrete stick better, more flexible after curing, & more resistant to water penetration- which sounds perfect for aquarium purposes. Anyone know if it would be fish-safe? A few of those links mention "non-toxic".
http://www.lowes.com/lowes/lkn?actio...207&lpage=none
http://www.hardwarestore.com/media/msds/304378.pdf
http://www.summitville.com/pdfs/S-775.pdf
http://www.summitville.com/pdfs/S-776.pdf
http://www.summitville.com/pdfs/S-800.pdf
http://www.summitville.com/setting.htm
http://www.lowes.com/lowes/lkn?actio...207&lpage=none
http://www.hardwarestore.com/media/msds/304378.pdf
http://www.summitville.com/pdfs/S-775.pdf
http://www.summitville.com/pdfs/S-776.pdf
http://www.summitville.com/pdfs/S-800.pdf
http://www.summitville.com/setting.htm