Does anyone know what this is please? Spore type white particles. I did a water change 6 days ago but it has returned as before. I’ve just checked my water parameters and there appears to be a spike. Ammonia at 1.0ppm nitrite at 0.50ppm and nitrate at 5.0ppm. The fish appear fine and have been happily living in the tank for 4 months. Any advice would be greatly appreciated as my community tank, as with all my tanks, is very precious to me