BTW: Don't just drop all the bits of garlic in the tank. Before I got garlic extreme, I just crushed a clove of garlic as best as I could, put about 1 Oz of tank water in there, mix it a bit. Then I take out most if not all of the pieces, then soak the food in the liquid. (Long story short, just use the garlic juice.)
You should be alright. You might consider giving the cow fish to a friend to hold or just take. Because if it dies during your honey moon, the toxin it will release into your water will probably kill other fishes.