Cement Help

[SamuraiSid]

I purchased a bag of Quikrete cement mix, but was really after the mortar mix, as I've seen that used for fish aquarium builds. The store was 5 minutes from closing, and i grabbed the wrong bag.

I've done a lot of research on cement backgrounds, and believe it should be ok, but on the bag it says once mixed with water it becomes corrosive and it says the application is only for jobs 2" thick or more. The corrosive part might be an issue, but only because mortar mix can be applied with bear hands.

Im hoping someone could provide some insight. This is my first build and its going to be for a mature tarantula. The substrate will be moist, and humidity in the cage will be around 70%. No pools of water, or anything like that.

Also, can I mix plain 'ol acrylic paint into the water before adding it to the cement, instead of using any kind of cement specific colouring agent? It will hardly cost pennies for me to experiment, but if someone has experience Id like to hear about it.

Thanks.