Was observing my tank as usual and I realised 2 of my neons have these white spots on their fins/tail. At first i thought it might be those smaller grain of sand on them but after some time I realised that the spots are actually stuck/grown on the fins/tail. I went to google and came up with 2 possibilities, fin fungus or ich. I don't think it's ich because the spots are only on their fins/tail, but I'm not entirely sure either. Are there any other possible conditions/diseases? I did a 20% water change and added half dose of seachem paraguard for my tank because I have quite a number of scaleless fish in it so I don't want to risk going full dose the first time. My water temperature is constantly around 28-30celcius (82-86F) due to the all-year round hot weather here so I'm sure what else I can do if it's ich. All my other fishes seem healthy with no signs of this white spot on their fins/tail. The neons are actually still behaving normally and eating, but this may just be the start of some infection, I don't know. Do I need to isolate them immediately? What else should I do to help the situation? Is paraguard the correct thing to use? Or do I have to get kanaplex or something? Please advice, thanks! Water parameters: Ammonia-0 Nitrite-0 Nitrate-5 pH-7.6 Here are some pictures I managed to snap but they swim around very quickly and my tank is rather large for the neons so it's really blur.