CaribSea Aquatics Rubble Zone, 6 lb/1 Gallon, tan

Great stuff. Can be decorative or used as a calcium source. I use a piece in my sump to add calcium to my shrimp tank and some in another tank as decor. Good quality and shipped well. Highly suggest a good rinse first before use.

If you hate the ugly appearance of frag plugs/disks, this is most definitely for you. This is probably the best rubble rock to use for fragging. The rocks come in various sizes ranging from tiny (half inch) to quite large (2 inches). There are plenty of small nooks and crevices to allow your coral to attach on. The shapes of the rubble rock are actually quite attractive as well. You get quite a good amount of the rubble rock in this package.Thus far I have used these to frag basic corals. For mushrooms, I typically put a small layer of the rubble rock in a container and drop the fragged muschrooms in it, takes a couple week and they attach on. For leathers, I typically just cut the leather and rubber band them on to the rocks. These rocks are really good for the leather corals. Zoas also work as well. I have started to frag some SPS corals onto these such as green slimer with good effect. Recently glued a orange monipora setosa and is doing well.In summary this is an excellent alternative to frag plugs and disks. Much more attractive. I found that when I try to trade or sell my frags, buyers like that it is already on a small piece of rock rather than an ugly frag plug/disk.

More good size chunks than expected. Perfect

I’m not a fan of synthetic rock but this stuff is very porous and clean. I use it in cryptic and rubble zones of several different systems (along with ocean live rock). Great for transferring seeded rubble to new systems for instant cycle.

Nice jar of variable sized pieces. A lot of dust.Do people use these directly in their saltwater tanks? Do the rinse them off and how? Freshwater, RODI or saltwater? Do they need to be cured? How to cure?Info appreciated on this useful rubble rocks that can be used for frags, getting mushrooms to settle in, building strength to supporting structures.

This is a great product for fragging corals in a more attractive way that the regular ugly flat disks. I have had success using this to frag zoo's, nepthea, and gorgs, so far, and hope to expand to some of the other corals in my tanks in the near future. I don't sell my frags, just trade them around friends to expand our collections. It's nice to be able to give them something that looks good in their tanks right away.

These worked out better than anticipated. Add interest to aquascape and smaller fish use them for cover.

Great Rock. Bought about 4 of these. Over time. And I recommend them.