It is hard to find one that does not have a slime coat protectant! I find that over time they tend to gunk up the filter and overall add to the "sludge" accumulation as a tank matures. They can also create a film on the surface.
For me, my fish have their own slime coat and I see no reason to fix what's not broken, so to speak, unless they have been roughly handled or netted, or otherwise have an obvious disruption of the slime coat. If they have a minor injury then I treat with Melafix so they can heal themselves.
I have been known to use the Wardley's liquid water conditioner (which is just a dechlorinator/chloramine remover) even in large tanks, where I am sitting there counting drops to get the dose right
I forgot to mention that I use Amquel as my primary dechlor product.