I will go to home depot and have a look at that particular gravel. It's $8.50 here so a little more expensive but maybe still worth it depending how it screens.

My concern with all purpose gravel is I don't know what type of stone it is.

Thanks for this.

No problem! I hope it works out okay for you! Please let me know what you think, and if you find anything else!

Do you know the gravel in the link is a suitable type of stone?

I am in Ontario, north of Toronto (closer to Barrie). I buy chicken grit in 50lb bags for about $10+tax in farm supply store (found one in Newmarket). Best for size is #2 (or grower grit) that I use in the mix, and I also buy #3 (hen or turkey grit) that is larger size and I use it for top-dressing.

I used aquarium gravel - got lots for free on freecycle - 15l container full. It was colored green, so I let it sit for over a week in bleach. It didn't loose color, so I just used it as is. All plants with it in the mix are still alive and well (that was 2yrs ago).
Rina

I am west of Toronto and found white granite Poultry Grower Grit in 25kg bags for about $8 ea including tax. The store has several locations: Sharpe's Feed Store. They carry all sorts of feed for horses, chickens, dogs, etc.

I have had very little luck with landscape supply companies and garden centers, nearly all of them only have crushed limestone. Their smallest granite is always looks too big, same as the river stone. Van Beek's had crushed red brick for fairly cheap... but 80% of the bag is too large to be usable and would need to be pulverized manually.

Best bet is farm supply stores, as Rina suggested. Call around and ask - usually they're way out in the country and take a while to get to.