Hi there,am happy to say the fish is almost recovered..I didn't add anything else to the tank and by last night it had almost healed...she was still eating the whole time..just now I think she had scratched it on a plastic ornaments. .so also pleased to say that today I have some grade A malawi rock being delivered..il never use plastic again ....thanks everyone who messaged me .very much appreciated..il send some photos once I've put the rocks in later.x