Type the @ symbol and start typing their name, it will give a list of members that match that name (until only one name is left as you type) - click the name you want. Like
@Mystymantis I will say though some browsers can have issues with the forum code that makes it happen (Javascript/PHP/or such, no idea as I don't have access), and nearly all smartphones have issues with the forum itself in other ways too.
If the name isn't clicked/selected and turns blue in the post, then the user will not be notified of the post and is pointless.
Great to hear they are enjoying their new setup.
Heat wise I personally always use a thermostat and recommend one for any heat source (to prevent overheating, failure problems, and mantid deaths). You can make one,
see my guide here, or
buy one as well (I bought several of those lately from the seller and they work amazing once wired).
Not sure of the heating pad brand you have, but from reviews on Amazon the Zilla brand one tends to run cooler, while the Zoo Med brand does much better. Which isn't that important, as what you really need is a longer/wider heat source to properly heat all the divided segments. Using a larger heating pad will still overheat one divided section (closest to the pad) while the others remain much cooler.
The solution is to get another small pad for the other tank end (one at each end) but with such a low heat temperature sounds like it will not help much, or use another heat source.
For example a quick fix is to get two desk lamps with incandescent bulbs, one for either end of the tank, and adjust it to properly heat the ends (the middle will get warmed as well from the ambient temperatures of the other sections). Another similar solution is a
chicken brooder lamp and
125W red bulb - I bought them locally from Rural King and use them on my cricket tanks; while, it is much more than you need heat wise, a thermostat would make it heat to what you need properly.
The last solution seems to be exactly what is needed to heat all the tank sections properly at once, and that is either
reptile heat tape (
another here) or
heat rope; however, with either you will have to have a thermostat as they can reach temperatures of
120F or more (great
temperature report here too). It is a product I've spent some time researching and have been waiting to order soon, so if you have any questions about it I might be able to help.
The most common mesh used by keepers is the standard window/storm door
fiberglass mesh, seems it comes in many colors lately (gray, tan, light gray, and the usual charcoal/black). The plastic/fiberglass screen mesh can be purchased at nearly any hardware section/aisle/store.
A metal/brass mesh to keep fruit flies in with nymphs is quite expensive (like those from the PetCo/PetSmart fruit fly cultures), and only sold in huge rolls (best I found was typically $180+shipping or much more). The great alternative is to use
organza fabric mesh, and it can be found in most fabric/hobby/aisles or stores. Sometimes (like at Walmart) it is sold as ribbon fabric in 4" wide spools. I use it now exclusively on my mantid nymph tanks (and my arachnid habitats) and the fruit fly culture lids themselves too, and not a single issue anywhere in over a year.