Received my 2 lotus bulbs , 1 large one and the other a bit smaller, put them in my betta tank, after a good few days they both were showing signs of growth with tiny leaves beginning to show, unfortunately the large bulb also started to show a white fungus growth, so I dipped the bulb in a bleach dip (1-5 parts strength) for 2 minutes, then put it in a freshwater dip and left it there for a day, but the fungus was still growing, again a bleach dip this time for a good 5-6 minutes and after that returned to a freshwater dip and left for 3 days, it killed the fungus, I’ve returned the bulb back into my betta tank with so far 1 new leaf starting to grow, so all good now. 👍