Well, I have gravel and smooth rock, live plants and one silk plant....I had a goast shirmp..every day the rips got worse until I took shrimpy out..so I think it was him. So if the water is clean, I dont need any meds? I have a sponge filter made for a 30 gallon in a ten gallon the tank is cycled before I put him in it. There is no ammonia, o nitrites nitrates are low. If it wasnt the shrip..I think he is bitting his own fins..I geuss i have to wait and see. I have almond leaf in there, metifix and AQ. If he is bitting his own fins, I think I should remove the almond leaf, known to increase agression.I will do a 25% water change soon. I only put one tablespoon AQ for my ten galllon. I didnt know the fins grow back clear..Thank you! I would have worried it was fin rot.