So the other day I finished putting all of my plants into my tank and a few more Harlequin Rasboras (Bringing the total to 5 in a 55g. I bought out Petco's supply...). I got my CO2 working as well as my light so I had everything all set when the fish was acting strange; one started to rub it's belly against a plant. I googled what this meant and found that when they rub against stuff they could have Ich. I checked the symptoms and saw no white "powder-like" spots on them so it couldn't be Ich. It stopped for a bit and did it again today. It seems that it's only 1 fish doing it. I googled again what it could have been and found out that when a female (larger than the males) rubs on the bottom side of a leaf (which was what it was doing) it's signaling that it's ready for mating. Sure enough one of the smaller ones (males) came up and did it right next to it! Also, that same one that's initiating the rubbing is being chased by three of my other Harlequins. So I'm 99% sure that they're mating! Hopefully soon I'll have a few babies swimming around. Good thing I planted a ton of Dwarf Hair Grass for them to hide in!