Hi Everyone! I have had fish for about a year now but I still feel like i have a lot to learn so I am looking for any advice I can get. Let me know if I'm doing something wrong or if I should be using different product. I started out with a 1 gallon tank that I kept my female Crowntail Betta in. As she grew I decided to get a larger tank. The new tank was a 5 gallon with a filter, light source, and heater. I then decided to test my betta and got a few tank friends for her. Surprisingly she does really well with other fish. About 3 or 4 months ago I upgraded my tank again and my fish count has gone from 1 up to 14 + 3 snails! (1 betta, 3 neon tetras, 2 blackfin tetras, 3 fancy guppies, 2 lyrtails, 2 i cant remember the name of, 1 butterfly plecostomus, and 3 snails) Currently, I have a 27 gallon tank with LED lights that mimics the moon cycles, a heater keeping the water at 78*F, and a great filter. I use TopFin water conditioner which I use when I do 15-20% water changes every 3 weeks. Also, once a week I use Tetra brand EasyStrips, which are a 6-in-1 Aquarium Test Strips that check nitrate, nitrite, chlorine, pH, Hardness, and alkalinity levels and I get the ammonia levels checked frequently at a local Petsmart. I feed my fish 2 times a day with Marineland brand color-enhancing tropical flakes and I also usually give them bloodworms every couple of days. very little food gets left behind. So far I haven't had any major issues with my tank except for about a month ago i had a slight algae growth problem that my plecostomus and snails couldn't keep up with. It was recommended to me that I use AlgaeFix to help control the growth. So after doing three treatments of AlgaeFix following the directions to the letter I saw no improvement in the algae control and in the week following the three treatments I had 4 fish die! I stopped using the AlgaeFix immediately and no more fish died. I did some research on the product and apparently people were having the same problem with it that I did. Their fish started halfswiming/half floating and barely moving and not eating. Then the fish would swim around in a fit of panic then just die. I obviously then returned the product to Petsmart and made them replace my 4 fish that it killed. DO NOT USE ALGAEFIX....IT WILL KILL YOUR FISH!!!! Then a couple days ago I noticed that my betta has Cloudy eyes. My first thought was she went blind but she is responsive to light, she chases the other fish, she catches her food, and she still swims up to the glass when i sit next to the tank so I know she can still see. After doing some research I thought maybe its an infection so I went and I picked up API brand MELAFIX which is supposedly an all natural treatment for bacterial infections including cloudy eye. I am hoping that will help. Any thoughts as to why she has cloudy eye? water levels are good and temp is still 78*F.