Hi all! I am new to the hobby and in need of guidance. I have a 29 gallon tank lightly planted but soon to be moderately planted. It has 3 ottos, 2 guppies (m/f), 6 Cardinal tetras, 6 rummynose tetras, 1 GBR and one Honey Gourami. It is a peaceful community. Temp: 78-80 unsure which thermometer...