Well I use String to attach Ricca and Java fern to rocks. All was fine for a few months till today I woke up and say a cory upside down and breathing face. I quickly noticed he had a string noose in his gill. It seemed to be in there quite deep and it was rather sat. I ended up cutting him free but he managed to pull a large section of string with him and it is still in his gills. I am so sad. I hope he lives long enough for him to come out at night so Zi can capture him and remove the string.