White cement is best, as it has less contaminates.. which is why its white. It also has less silicates.
I have a big bag of it. The only place I could find it was at some hardware place that starts with an S.. sorry I dont remember off hand.. I can split it with you if you like. I made walls for my nano and it turned out really well. It took 6 weeks to cure and to get the PH down from like 14 to 7ish.
Lemme know
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