Found even more cory eggs. I've decided to setup a old 20ltr tank i have from when i first got into fish keeping to try and hatch them in there. I've already got a heater for it. Will get a air filter for it either this weekend or next and start moving any eggs i find across to it. Will move the pre filter from the 240ltr tank across for a kick start in BB as i still have 4 new pre filters.