I am assuming its a 20 long. Yes you are heavily stocked as it is IMO. Assuming you have plants substrate decorations it's not 20 gallons. I had a pair of GBR in a 30 gallon and it was tight, again my opinion.mperkins21 said:I currently have a 20g planted tank set at 80 degrees
a pair of Gbr
I was wondering if could add an algae eater of some sort (pleco, oto's) later on when the tank starts growing algae?