Although didnt have to treat well estabished Dutch Aquarium due to Ick that often, Clout by Aq Products was only product which earned my trust to treat Ick in planted/non-planted tanks w/o increasing temp. Usually needed two treatments to eradicate the problems.
There is one drawback as some fish may be sensitive to this product so follow its instructions.
Even learned how to SAFELY and EFFECTIVELY use this product on many f/w scaleless fish/finely scaled fish including corys against its instructions, not that I recommend for all.
btw, quinine was least effective ingredients against Ick, ime, although never used Tetra product mentioned above..
Hope all goes well!