Lol sorry i don't think he is color of the pineapple but i love the name , sound yummy.
About salt, next time do not afraid to use in required dose. It proved on this forum with many people safely to use it to treat bettas. For 2 years on the forum i never saw that anyone had problems with it unless he will include in that 0.0001 % that can probably happen ,which again i never saw.
I will give you example . I worked at the hospital where we had technologist who pictured eyes using IV contrast in the vain. So she was doing it every day about 20 people a day. So for 5 years that i worked there we had one person who had bad allergic reaction to the contrast and died. Sorry that i gave that example .
I also just want to give you an example under which conditions you can use both salts threatment.
Aquarium salt for injuries,wounds,external parasite, fin damage/rot(not plant tolerant)
Epsom salt for buoyancy issues,swim bladder problem, constipation, pop eye, dropsy...
Both have a antibacterial/fungal effect
Both you can use in doses of 1tsp/gall up to 3 tsp/gall depending on what /why you treating . Also usually you need to make daily 100% water changes.
Aquarium salt you can use 10 days up to 14 days in some cases - NO linger than that
Epsom salt is very mild and you can use it long term and in some cases like chronic constipation you can use it in low doses indefinitely.
Both always pre mix first and make sure it dissolved .