You could also try plants weights. Put plant weights on and then surround plant with stones as suggested might work. I'm convinced the Corydora barbel damage thing is an internet myth that just won't die.
Hmm I can't really think of a candy that I can't find anymore. As a kid I loved candy corn. I don't like it now but it still takes me back if I eat some. Nowadays my favorite Halloween candy or anytime candy is Reese's peanut butter cups.
I settled on Eheim jager heaters when I was setting everything up. I can't remember exactly why but I'm borderline OCD when it comes to researching every component that I use so there must've been a good reason lol.
When I looked at rainbows for my 40 breeder I settled on praecox as being the largest size I'd want in there. Rainbows really use the entire length of the tank zooming back and forth. Rams will be fine in the 40.
I don't know if it's alleopathy related but in my 40 breeder which is semi-heavy planted I can't grow water sprite. It was doing so bad that I took it out and floated it in my betta tank as the only plant in there. It thrived in that tank.