So, I’m a bit bummed.
For my scape, I used hydraulic cement to make small 2” pedestal blocks to keep the rocks off the glass and allow for burrowing animals access under the rocks.
I also used it to elevate a Tonga shelf piece on top of a piece of pukani. I cemented little chunks of pukani into the large block to provide a 4 point contact to sit the shelf on.
Looks like this-
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Last night, I switched my gyre to the opposite side in preparation for getting my RFA on my return and bringing the sump in line.
This morning, I found this-
It’s chunks of fragmented hydraulic cement, and the areas I attached the ‘contact points’ for the shelf are crumbling and falling off. Seems the switch in flow direction collected it all and made it obvious to see. The shelf is still stable at this point, but it’s only been in a month , so it’s not looking good for long term stability. However, the shelf weighs like 30lbs, so I don’t think it very likely something will knock it off the pukani, but uugghh, I’m stressing.
I’m thinking I’m going to need to drop my water level, take the plate off, and epoxy the contact points more thoroughly.
I don’t want to use any more of the cement, since it’s obviously not working for that application. The blocks seem fine though.
Any recommendations for a quick set epoxy that I could use?
