I think the change in water temp triggers most species into breeding or a large water change. Either of these changes haved worked for me over years especially with Frontosa's. My temp is changing during a WC because I have to gauge temp with my hand straight from my faucet. Which I bet happens in about 80% of the tanks out there during a WC. The difference wil depend on someones feel and the % of WC to tank volume, unless they have a temp gauge.doodlebug-2 said:With corys and angelfish alot of times preforming a water change with water that is a little cooler will cause them to spawn, if they are in condition etc. Is the same true for cyprichromis?