First time fish mom needs help

[jillybeans01]

I rescued this Betta from a friend who was keeping him in a 1/2 gallon tank with no filter/heater. The water was brown and disgusting. I have set him up in a 10 gallon tank with a few plants and a mystery snail. It has cycled. The water parameters are all ideal except low alkalinity despite having crushed corals in my filter. Ph is 7, I was hoping the crushed corals would help raise it a little as well. The corals have been in there about a week. My fish has developed a white coating/fuzz around his left eye, I have researched ich and concluded it is not that, however I am not sure if it is a fungus or something. I wonder if his previous tank was so cramped he could have cut his face on the sharp plastic plants that were in there and that this may be the wound healing differently due to different water? I am not sure, but I tried fixing my water parameters first and it is still seeming to progress. It appeared to grow, shrink back and then grow again. I’m not sure how to add a photo of him, but I have a pretty clear photo that I am willing to email to anyone that may have any ideas. 

[jillybeans01]

I would also like to add that though I have only had this fish for a few weeks, he doesn’t seem to be acting lethargic or sickly and still has an interest in his food. Here is a photo from today. 

[DSH OUTDOORS]

Take a look at the following link.

https://www.aquariumcoop.com/collections/fish-medicine/products/mardel-maracyn

I would start with this and if that doesn't do it they have a number of other medications.

[Colu]

It definitely a fungal infection I would treat with API fungus cure maracyn will have no effect on fungal infection it only treats bacterial infection @jillybeans01