My moss is not growing well, despite what appeared to be a great start. Growth seems to have stopped, with tips turning brown. Tank is 15l flexi mini - so high light (very high, as the moss is about 1 inch below surface), 5 hour light period. Co2 is fine, 10 hrs a day. Dosing EI. Water is very soft. 5 Cherry shrimp, 3 Amano. Circulation is fine. WC 50% a week. Sits on east facing windowsill. Water temp 22c. Small amount was tied on with cotton thread, grew really strongly for a couple of weeks. I then made a mistake and used Glularaldeyde on a small section of Cyanobacteria. This damaged the area on the right on the narrow branch, but despite it only contacting that small section it seems to have had a negative impact on the whole lot, possibly? Should i just start again, as I have the remainder of the pot growing happily on the windowsill in a dish? Thoughts?