I would like to draw your attention to the specific gravity (sg) requirements for both of the fish you would like, they are very narrow requirements. This is an example of how sensitive marine fish are. The lionfish would be the one that is most sensitive because the eel has a wider (but still small range). The pH is also smaller range than the freshwater fish have. Have you read up on all the water parameters for saltwater tanks? It is important to understand what each is and why it is important to stay in that range (that being said it is also helpful to understand what would happen if the parameter goes above or below the required water condition). I just wanted to point out the differences I was telling you about earlier.

Salt water tanks require extra equipment that I am not exactly sure what you would need specifically, but it does tell you in the articles on Drs. Foster and Smith's website. I know that protein skimmers and UV sterilizers are used in saltwater setups. As well as your normal items (for freshwater and saltwater) like filters and water heaters. Chillers are also used if your tank gets to hot during the summer, but again I'm only familiar with experience in freshwater. I've also noticed that all of the saltwater setups I've seen have a separate tank for the filter area, but I haven't done a lot of research on that.

From the comments I've read on aquarium hobbyist, some people experience problems with stress on their eels from being transferred and being in a new tank... so they don't eat at first. Be sure to do a lot of research on the fish you do intend to get before you get them. That way you know what to expect.

I'm interested to know what freshwater fish sparked your interest. You can research all (fresh and salt water) fish that you are interested in that way you can make a well rounded decision. And as always, I'd be happy to help you find the information, but I usually start with liveaquaria.com and go from there.
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Phishie
Site Coordinator

"An ounce of prevention is worth a pound of cure."

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