I figured I will give an update in case anyone is intrested. I used the seachem product and used a little more then the recommended dosage. It says to put one scoop in the food I did a scoop and little more then half. I did this because some of it will fall off and the shark is a little larger then the fish I seen them used for. I then turned off the pump to the main tank and dosed the shark tank with about half the recommended dosage. In the morning I turned the pump back on.
The red is gone and he eats a lot more. Before I medicated him he only ate one small piece of squid. Now he will eat 5 pieces even more of squid, clams, shrimp and Ocean Nutrition shark formula (which is now discontinued). In short I will recommend this medication. You should always follow the dosage but you don't have to worry about overdosing. I used almost double dosages each dosing. Gave 6 dosages over 9 day. The reccomend is once every 3 days for 3 days max.
Here is a video. He is missing the food because I am holding it high to try and get his stomach on the wall. In addition he is pretty bad at finding his food, he is getting better. I also usually drop it in front of him here he had to move a little.
[video=youtube;XJ7Zd2lsUK4]https://www.youtube.com/watch?v=XJ7Zd2lsUK4[/video]