Question for anyone who can answer! How do you harvest the eggs to put in your tumbler? With your fingers? Scrape off glass/rocks/mop with a credit card? I'm hoping to have cory eggs soon and am scared to touch them! I only have experience with cichlid breeding and never harvested the eggs. My corys have spawned once and I didn't notice until the fry were about 2 weeks old and I hope they go for it again soon. Was thinking to buy this tumbler in advance. Also, besides feeding, any triggers for cory spawning like temp, water change, etc?