if you look hard enough, there are some compatable spiney eels that are also sub-tropical. you will however need to do some research on this , spiney eels come from many places around the globe from africa to sub-tropical india and warm temperate china. how ever some do prefer so salt in the aquarium , some grow huge , one to look into if you want a spiny eel in with a rainbow would be [FONT=Arial, Helvetica]
Mastacembelus zebrinus it comes from a area close to rainbows area and only grows to around 6-8" and would make a decent addition to a sub-tropical comunity tank . [/FONT]
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[FONT=Arial, Helvetica]one thing you must consider is without a winter cooling period a rainbow will die half way through the following year , and you will most likely think it was for no reason , it is indeed for a reason and that is 99% of the time due to no winter cooling period .[/FONT][/FONT]
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[FONT=Arial, Helvetica]as baloo pointed out , rainbows best takemates are other rainbows , and your tank would make a great species tank for a group , also if you have chosen your rainbows well then they will make ANY tankmates look drab in comparison . [/FONT][/FONT]
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[FONT=Arial, Helvetica]if your rainbows do not look like the ones below , it maybe just that you have not got your tanks set up correctly. if in a species tank and set up correct then a rainbow snakehead should make any fire eel look drab by comparison
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and if the ones you picked up are the so called blue rainbows ,ie sp. assam the same things apply but your fish should look like this
cheers col
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