The PVC rock stands are very noticeable here. I cut them 5.5" long for a 5" DSB. Sand is still being added and LS will be added later.

I went with 2" PVC this time and 1" holes in the stands as shown, one on top and two at the bottom. I have more to make tomorrow and will take a pic of them before they go in the tank. Two reasons for the holes, one, the stands will be filled with sand and the holes in the bottom allow DSB worms to crawl into and out of the deeper layer. Remember, my method of raising the rock above the sand is to eliminate the inevitable dead area with the rock directly on the sand. I don't want to create dead spots in the pipe stands. Second, the upper hole, usually only one, besides being there for water flow, is for safety hideouts for little fish like blennies, gobies and such. Besides the rock holes and crevasses they can choose these little nooks. This is just an easy way to provide many hide-a-ways for them to fight over. They're very agressive at defending their home.
Dick


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