We got our first big rain since school was out in June today. I don't think it will help my grass much, its mostly toast except where we water it near the pool. I added Clorax before it stopped raining and turned on the filter once it stopped. I also broke down and bought some Algeside. I'm not sure if I'll use it or not, but if I remember from last year, everytime it rained I had issues. Must be all the pollution in the rain? So I'll shock and see how it goes. You get too much rain and we have too little.... Could you send a bit more up North? :-) Kimrst