Hydra, member of the Cnidaria phylum and very similar to corals, can be turned inside out and within a short period of time the cells reorganise back into the original configuration.
Information on various methods and techniques for movement of water within and to/from the main display tank.
Alkalinity and Calcium Maintenence ( 3 items ) Calcium reactors, Nilsen reactors, additive recipies etc. for maintaining alkalinity and/or calcium levels.
Electronic Projects ( 3 items ) Various miscellaneous electronic projects for a reef aquarium.
Feeding and Additives ( 6 items ) Projects that have to do with providing food and additives to a reef aquarium.
Lighting ( 5 items ) Plans and details of making your own lighting for a reef aquarium, including not just the main lights.
Protein Skimmers ( 5 items ) Full and partial plans and details on the construction of various protein skimmer types.
Tank, Stand and Miscellaneous ( 8 items ) Plans and details of tanks, stands, cupboard, sumps used for setting up
a reef aquarium. Plus additional general projects that don't fit into
the other catagories here.
Temperature Control ( 3 items ) Equipment to assist in the maintenence of the appropriate temperature range for a reef aquarium.
Tools, Materials and Techniques ( 4 items ) Some articles with details on the tools, materials and techniques that can be used in DIY projects.
Information on various methods and techniques for movement of water within and to/from the main display tank.