I have a cycled 20g long tank (24x12x16) light-moderate planted (will replant current plants when they grow). The water temp is ~80-82F without a heater (room temp) since I live in the desert. I currently have: 2 hatchetfish (chase each other constantly), 4 neon tetras (I cannot find a home for these 4 since 80 is too hot for them but they have been in the tank for 3 months), 1 bn pleco, 3 sunset thick lipped gouramis (I got unlucky with 2 males and a female, one male is super aggressive to both fish so I plan on rehoming him leaving the other 2 to pair), and 4 green corys. I was thinking of adding a male GBR to the tank, maybe a pair if I can find one. Would a pair of them, or even a lone one, be ok with the other paired gouramis? The male gourami is already turning slightly black after about 3 days in the tank. Im hoping they will breed soon but not sure with the other aggressive fish. Every comment and opinion will be appreciated! Thank you!