When the author states "small amount" through a soft pipette, I'm curious how much that is. Half a pipette? 25% of the pipette? I have a flowerhorn (gustav) and have tried everything. For one month he's been sick. He had one week during that time where he seemed to be getting better and ate 6 pellets a day. Since then, he's developed the typical hole in the head. Someone mentioned gentian violet on the hole helps. Can anyone tell me if this is true? I've done Epsom salt in the tank, para guard but unfortunately he won't eat so oral meds aren't an option. He seems to spit them right out. advice?