Concrete to bond rock?

[Skimmerking]

and you can put it together in the tank and it will cure in the water and have no ph effects too that is what i heard.

[xtreme]

There is no instructions on the bag but I found this info.

I'm glad it is on sale, the guy there told me the regular price is 98 bucks a bag.

[Delphinus]

98 bucks, ouch.

I'm going to have to go tomorrow to pick up mine, I have no wheels today. I can't wait to get a bag though and try it out though.

[Skimmerking]

ya let me know tony i could get some too ,and they buildign the stacks in my tank.

[StirCrazy]

just a side note here, personaly I wouldn't cement your rock togeather.. just think of the mess if you had to remove some rock to get rid of a nucence algae or to catch a fish.. if you are dead set on cementing it togeather then I would recomend doing it in managable chunks so you can remove stuff if you have to.

Steve

[Bryan]

I have used with success hydraulic cement commonly found in Home Depot/ Rona in the glue section. It is a underwater concrete and comes in small milk cartons. Cures under water and I noticed no significant ph spike. But it is best to cure it outside for a day as it is stronger, just cover the rock with a wet towel

[xtreme]

Here is an arch that we managed to create over the weekend. The two joints don't look very natural but hopefully with time the coraline and what not will blend them in so they aren't as noticeable. Next attempt will be a pillar of some sort.