08-07-2007, 05:03 PM
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I change out about 35% water every week with lots of gravel vacuuming along with it. That may not seem like enough with as many of the messy buggers that I keep but my water parameters are perfect. Did I mention LOTS of gravel vacuuming? Buckets of black gunk. Moving on...:) I add 1200mg of calcium citrate after water changes and usually twice a week in addition. If I notice the snails go right to it and eat it up I will add more. They know what they need better than I do. I use calcium citrate tablets that are a vegetarian dietary supplement and contain no sugar, starch, artifical colors or flavors, preservatives, etc. They just have calcium citrate, vitamin D3, cellulose, cellulose gum and magnesium silicate. My snails don't have any growth lines. The only thing I can think of is that the larger water changes you perform cause the lines. I'm certainly not suggesting you change out less if that's what you need to do. There's nothing wrong with growth lines.