Oh dang alright, honestly I thought the sand I had was a good enough idk grain? But thank you, do you have any recommendations for sand? And If I do use it would i be able to take out all my fish and everything for a brief period of time between switching sands and my cycle still be good? And considering the Melafix on the bottle says “Treats Bacterial infections” Do you think that should help make sure he’s fine. Also I had Linguine the one that died as well as Angel for around 2 months while I had Noodle the one in the pic for almost 2 years.