If you have ornamental shrimps and snails in the tank and your fish kena ich... I'd say forget the treatment... Unless you are ok with replacing all the inverts... Even the coppersafe medications kill inverts... Salt most likely too...
But for plants, most medication will state amount to not cause harm to plants...
Anyway, personally, I dun medicate anymore...
Oh, please do not take the fish out and medicate on that fish with ich only... It does not work... the ich parasite could still remain in the display tank and attack the recovered but weakened fish when it is introduced back or attack the remaining ones in the tank...
You can fish out all fish, medicate in a separate tank, keep the display tank medication-free and fish free for 1 or 2 months and then re-introduce all the fish... Inverts are safe with the ich parasites...

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