I have a 30-gallon nano tank with a 3-4 inch deep sand bed and 30-40 pounds of live rock.
I have a 2-inch orchid dottyback, a banggai cardinalfish that’s nearly adult sized, and a pair of ocellaris clownfish, both of which together are probably about 1.5-2 inches. The tank’s been running for about a year now, along with a diverse cleanup crew and filter feeders. I don’t use any equipment, filters, skimmers, sumps, or anything like that, and I don’t plan to. I like having my setup as simple as possible. In about a year or two I’m probably gonna move, and I’m planning on upgrading to a 75-gallon tank. In the meantime, the nitrates never seem to go above 5ppm, and I do weekly water changes.
I want to add some yellow to the tank and I have a tiger pistol shrimp in there. The orchid dottyback and banggai cardinalfish both hang out on the right side of the rock and the dottyback rarely hangs out in any of the caves or crevices in the middle or left side. So, my question is, can I add one more fish to the tank, specifically a Yellow Watchman Goby so it'll pair up with the pistol shrimp, claim the left side of the tank, and add some much needed yellow? Or am I going to risk causing an ammonia spike and/or territorial aggression in the tank by having 5 fish? (btw the banggai cardinal is more territorial toward the dottyback than vice versa).
Here's a picture of the tank
I have a 2-inch orchid dottyback, a banggai cardinalfish that’s nearly adult sized, and a pair of ocellaris clownfish, both of which together are probably about 1.5-2 inches. The tank’s been running for about a year now, along with a diverse cleanup crew and filter feeders. I don’t use any equipment, filters, skimmers, sumps, or anything like that, and I don’t plan to. I like having my setup as simple as possible. In about a year or two I’m probably gonna move, and I’m planning on upgrading to a 75-gallon tank. In the meantime, the nitrates never seem to go above 5ppm, and I do weekly water changes.
I want to add some yellow to the tank and I have a tiger pistol shrimp in there. The orchid dottyback and banggai cardinalfish both hang out on the right side of the rock and the dottyback rarely hangs out in any of the caves or crevices in the middle or left side. So, my question is, can I add one more fish to the tank, specifically a Yellow Watchman Goby so it'll pair up with the pistol shrimp, claim the left side of the tank, and add some much needed yellow? Or am I going to risk causing an ammonia spike and/or territorial aggression in the tank by having 5 fish? (btw the banggai cardinal is more territorial toward the dottyback than vice versa).
Here's a picture of the tank