I did the water change already but I did a 25% because I didn't get your message till after. I just left my lfs. I picked up a internal uv filter, aquarium salt, and ick killer. My lfs guy told me to get rid of all the gravel for now. Put it in the sun to kill any parasites and then add the uv filter to help kill the parasites. Use half the dosage of the ick and treat with a little bit of the aquarium salt
Don't do anything to the gravel if you disturb it will make matters worse. Btw the nitrate reading is not bad enough to kill, the ammonia and nitrite is what I want you to focus on. Don't add any meds to the aquarium the salt will actually help. Your Flowerhorn does not have ich.



