Recent content by tomfrh

Does the APP give the same answers as this page: https://www.troublefreepool.com/calc.html

Thanks. It works now. Interestingly I'm getting slightly different answers compared to the poolmath website?

That link doesn't seem to work?

Hi, I'd like to put the CSI formula into excel. Does anyone have it? Is there a spreadsheet available?

Thanks for thee replies. I have most of that stuff already, except mannitol, the indicator, and speed stir. Why do you need a speedstir? Why is it so useful for this test compared to other titration testing.

What are the options for testing borates in australia? What products are available?

I am trying to understand what happens when you shock the pool with chlorine, e.g. during the slam process. Where do the chloramines go? My understanding is that adding chlorine converts the NH3 to mono, di, and then trichloramine. What then? Does the trichloramine simply evaporate away?

Yes the bottom is all dirty from just being grinded. That stuff comes off easily with a gerni. It’s just the wet dust from the grinding. It forms a sludge. You wash it to the deep end use a shop vac to clean it up. Then I did an acid wash to finish it off. Here are the steps area. I did these...

Photo..

Here’s some pics of the process. Once finished and acid washed it looks similar to the other pebblecrete, except slightly lighter as there is more exposed white cement.

I just ground the steps and the shallow end. I did about 40m2 all up in a day. I couldn’t be bothered with the walls and deep end, as you don’t tend to stand there. I used 125mm diamond cup grinder and a 100mm 50 grit diamond pad for the steps, and a 180mm diamond cup grinder for the floor. The...

Very nice! Excellent match.

CA_Tallguy, it doesn’t generally need to be waterproof. It just needs to stay in place. If it’s a small area like that it’ll be easy. Cut some slots into the concrete with an angle grinder and it won’t fall out. I spoke to pros about waterproofing first and they told me if I do that then I can...