Betty- Sodium biphosphate, also known as Monosodium Phosphate, works really well for bringing the pH down in soft water. But what you would really like best is to make some good old back-to-nature peat tea. Get a BUNCH of peat, and soak it in a bucket of water. Collect the brown liquid (Black Water) that you make this way and use it a little at a time to lower the pH in those spawning tanks. It's fun and organic and the fish like it for more than the pH effects. Don't worry if you get some of the fine peat particles in the tank; the filter will pick it up and it will act similar to a Diatom filter. Then get some peat-spawning killies to breed in the peat when you're done with it. Steev haika@drizzle.com wrote: > I've got a couple fish that would probably spawn more readily if I could > figure out a way to bring down the pH safely. I've tried a number of > things that have helped, but I still rarely get the pH below 7.0. ... ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe gsas-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/gsas-member/