I only feed frozen food once a day. Take a cube of food, put it in a cup of RO water and dissolve, I also add minced garlic just about three pieces about the size of these letters and add it to the mixture. I press the garlic on to the side of the cup so it releases its juices into the mixture.
I feed half of the mixture once a day then I put a lid on the remaider and put it in the fridge for the next day. I usually remake the mixture after the second feeding that way the mix soaks in the garlic juices for atleast a night.
I also feed pellets to the hippo, when I sit and watch the tank. He is the biggest fish in the tank so he usually gets to the pellets first. Just feed one pellet at a time to make sure the food is being eaten.
As far as paracites go, I have noticed that once I started to feed Garlic the paracites started dissapearing ( have read that it is due to garlic boosting the fish's immune system, but it is not scientifically proven). It seems to work for me. you saw how fat my hippo was.
Cleaner shrimp are cool to have in your fish tank, They do clean the fish but not to the point where they get rid of things like Ich or Flukes.