Bread yeast works fine for me. I have used different brands no problems. No need to ever check the temperature of the hot water, bread yeast can survive in near boiling temperatures. Just heat the water in the microwave, until it is hot. If it is boiling pour it into another cup to cool it a few degrees then add the yeast.
Any amount of yeast will work, more yeast will make it fizz faster, while less will take longer but still work.
Check your seals in the bottle to the tubing perhaps you have a leak. Good mixtures should not foam, but make small soda like bubbles. Which may be why you did not notice.
You should start to see bubbles in your tank after 24 hours, swirl the bottle to make the yeast more active.
Even "bad yeast" will have some living, so just double the dosage and use it anyway.
I fill the water up to 9cm (3.5") to the top of the bottle to prevent the yeast from flowing into the tank. Keep the bottle above the tank or at the same level if you do not have a check valve.
Also make sure the sugar is rinsed from the sides of the bottle near the opening, to keep the yeast from climbing the sides.
I believe bread yeast also last longer than brewers yeast, and it's defiantly cheaper