possible parasites and meds

[Beckybettas]

Hi, Im looking for advice on safely medicating fish. Its a 32 gallon with ramshorns, bladders, 1 assassin,  1 mystery snail, 5 amano shrimp, 7 pracox rainbows, 5-7 kuhli loaches and a deceased giant betta. I also found a deceased rain bow fish yesterday. I added 7rainbow fish about 3 weeks ago and no I didnt quarentine. The betta recently was lethargic quit swimming, stopped eating and just rested on top of his see shelter near the surface. He became severly bloated and pine coned, I didnt want him to continuing to suffer so I put out of his misery. When I netted him I noticed a small greenish-brown jelly like blob on his side. The deceased rainbow fish just stayed at the surface, not eating and got very thin. So Im thinking possible parasites. I had noticed the betta and  some rainbows occasionally rubbing on plants. The betta also had a small round brown spot on his eye that never changed. I dont want to loose any more fish, Some more meds arrived today so what should I use? I m sorry but I didnt get fish pics. Here is a tank pic.

parameters: ph 7.2, ammonia .5 ( my tap H20 is also .5), nitrite 0, nitrate 5, temp 77-79 

 

[Colu]

As you have snails and shrimp I would use medicated food it less likely to harm your shrimp or snails what I would do is treat with levamisole in food feeding a small amount twice a day one day  a week for 4 weeks and follow up with a course of paracleanse in food feeding a small amount twice a day for upto 2 weeks @Beckybettas