cataracts on black moor

Question
Hi, I noticed a blurry film over my black moor's eyes today...is it cataracts?  I understand they are more prone to blindness anyways...should I worry?  He is a loner...doesn't hang out with my 3 ryukins, 1 oranda, 1 comet who all group together often.  He comes out of the cave more often now to scavenge which I'm happier about.  Should I keep feeding him dry flakes on water surface or get a food clip for cucumbers?  I dropped in a Hikari frozen brine shrimp chunk (store-bought)and everyone loved it, except black moor didn't even notice all the action, just kept on surface looking for food, so I gave him his own rations of dry flakes at the top.  Later he's on floor scavenging with others.  Am I doing the right things on feeding him?
Also, is this an appropriate number for my 55 gallon (everyone is only a baby still - 2 inches)Do I have too many to let them grow to adult size?  thanks for your advice

Answer
There is a chance it is true cataracts however there is a better chance it is a fungal infection. You will need to test your water. Goldfish are more dirty than other fish and tend to produce more ammonia which high amounts of ammoina can cause numerous issues. Feeding can be a cause as well. Any fungal medication should help take care of the problem should it be a fungus, Aquatronics made a product called Eye Fungex specifically for the problem. First, you will want to test your water as if the water chemistry is high in ammonia and nitrite this could be the cause and would need to be gotten under control. You are feeding a variety which is good but I did a Google search for Black Moor Goldfish and found an array of information you may find helpful to check out as well and addresses the food concerns as high protein levels can also cause problems. I've got you going in the direction you need to go but I would definately get the water tested and check out those websites from the Google search. Happy fish keeping!!