Our new pool was just plastered yesterday. Our goal is to acheive a dark blue looking pool. We picked Onyx quartzscape, but had them but 25% less Obsidian to make it a little lighter. The hose has been on > 24 hours and the pool is almost full of water. Right now the plaster in the shallow end looks way too dark, more than the sample tile for the standard onyx. There is a lot of plaster dust that I've started to brush now. Does the plaster get lighter with start up? I did not want a lagoon dark look. Am I prematurely worrying, Please help.