Hmm I've not heard that aloe itself is bad but maybe it isn't optimal to use a product that contains it.. I've used API Stresscoat which does have aloe and I've used Prime. These days I just use Prime, I always assumed that provides "slime coat" was just an aloe additive though.
To the OP, SeaChem Prime is arguably the best water conditioner on the market. You don't need to use near as much of it as other products and it's extremely effective. Many many experienced aquarium keepers swear by it.





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