I have a 75 Gallon planted tank with Bolivian Rams, and a pair of Blue Angels. On the left side of my tank I have a big piece of slate, and some Anubias plants. I did a 50% water change a few days ago and used cold water for the change. Within 24 hours of this, two of my Rams paired up, and laid eggs on this piece of slate. A few hours later, my Angelfish laid eggs on one of the Anubias plants right next to this piece of slate. It's funny, it's like they were using each other for extra protection, but couldn't care less that these pairs were so close together. I have never raised fry before, so I quickly researched how to set up a fry tank. I removed the piece of slate, and the leaf from the Anubias, and put them in the same 5 gallon fry tank. I just came home from work today, and the piece of slate and the leaf are completely covered with wigglers! Holy ! I didn't really have my hopes up because I have never done this before, but I definitely was not expecting both clutches of eggs to hatch as well as they did! I was using Malachite green as an anti-fungus, and just did a 50% water change last night, and added more malachite green. Now that I have wigglers, how often should I do a water change??