Hi, I'm new to this forum and indeed to fish keeping but am in need of advice. My son was given a small tank with 2 fancy goldfish for his birthday. After only a month we lost one of them to what I'm pretty sure was swimbladder. We waited a couple of weeks to ensure 5he other fish was ok before deciding to invest in a bigger tank. We bought a jewel 700l, after setting it up and adding necessary chemicals I also added old filter matter from previous tank. We waited a few days before adding our fish. After another week we did a 50% water change and added a second new fish. Again we waited a further week and today carried out a 25% water change (advice from fish supply shop) and added our 3rd fish. It was shortly after this that I noticed our original fish, a black moor had 2 white spots on his tail fins. After consulting the Internet it was suggesting white spot and we rushed back to the fish shop just before closing and bought some white spot treatment. First dose was administered to tank a few hours ago. However the more I look at these spots now the more they look sort of fluffy and I am concerned that it may be fungal and I have administered the wrong thing in haste. What should I do?. I will try and upload photo.
Just to add after reading up for the last few hours I am worried that I haven't been testing the water levels. I wasn't aware of this and after buying all our equipment and fish from the same store I'm a bit peeved that this wasn't mentioned to us. Any advice would be gratefully received, be gentle please 😊
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