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However I love my tank and am very proud of it all I need is higher filtration cause one filter is old but it's not nasty water just could be clearer and when I get a bigger tank I want a big filter with the 3d addition
If you mean allergic to using iodine in the water for keeping the shrimp, I have never needed to use it. If it is because of the shrimp themselves, I wouldn't be able to say about them causing an allergy. But no worries, you wouldn't want any shock causing tank inhabitants.