If you aren’t attending MACNA then you might be wondering how all these huge saltwater tanks get all their water in them. No, we aren’t mixing our own water here. The water was actually provided by CaribSea. Their product aptly named Sea-Pure is used for saltwater. Sea-Pure is ocean water. Let me rephrase that. It’s water direct from the ocean. It’s not a salt mix. It’s real saltwater. Real saltwater from the ocean usually has a salinity of about 1.027 which is probably higher then most aquarists are used to when compared to synthetic-mixed-saltwater. As a reminder proper acclimation is always important when dealing with a higher (read: normal) salinity level. Sea-Pure is great for smaller aquariums or ones in which you don’t want to have fool around with mixing and hoping your parameters turn out correctly. 4.4 gallons retails for about $20, but you can catch deals on it for much less at your favorite local fish or pet retailer.