20H Stocking

GCP01 · 11/20/2017, 11:20 AM

Hi Everyone!

I've always wanted to start a reef tank and right now I'm in the planning phase and will hopefully finally start a tank by this coming spring. I'm having problems deciding what size tank to go with. I definitely want to keep it under 29 gallons because I'm a college student and will likely be moving around a bit so I'm hoping a smaller tank will make moving between living situations easier. I'm leaning most towards a 20 high because I enjoy the aesthetics of a taller tank and the 29 is erring on the large side for me. I also enjoy the look of a 15 gallon but think it's too small for the fish I'd like to keep. These fish include:

1 Blue Dot Jawfish
1 Royal Gramma
1 Ocellaris Clownfish
1 Forktail Blenny
1 Yasha Goby

I guess my question is if a 20H is suitable to house all these fish. I'm mostly concerned with each fish having enough space to establish its own territory, like the clownfish. I'm also on the fence about the goby because I fear the jawfish might not appreciate another bottom dweller in the tank. Please let me know what you think!

Fiver · 11/20/2017, 11:54 AM

Personal opinion:

- I would knock one, if not two, fish off of your list given the tank size.

- I would also vote for a 20 long vs a 20 high, because most fish (and all the ones you listed) use lateral space, not vertical space. (I appreciate that you like the aesthetic of the 20 high; this is just my opinion about the best use of space for fish.)

- I think you will enjoy your clown more if it's in a pair. The pair dynamic is very interesting, and, I just find that a tank of all single species looks unnatural/unappealing aesthetically. I think it helps to have a pair/trio/small group of one type of fish among your scattered singles if your tank size and stocking will allow.

- I have a yellow watchman goby and lawnmower blenny and they're fine, but I also have a 4-foot long tank. My sense is that burrowing gobies tend to have small territories, so it should be OK.

Good luck!

Xandernfs · 11/20/2017, 03:00 PM

When I had my 20H, I had 2 ocellaris clowns, 1 clown goby, and 1 tail spot blenny. That felt like enough for me. I would subtract 2 from that list unless you have a skimmer and want to be doing water changes 1-2 times a week.

11/20/2017, 11:20 AM	#1
GCP01 Registered Member Join Date: Dec 2014 Posts: 1	20H Stocking Hi Everyone! I've always wanted to start a reef tank and right now I'm in the planning phase and will hopefully finally start a tank by this coming spring. I'm having problems deciding what size tank to go with. I definitely want to keep it under 29 gallons because I'm a college student and will likely be moving around a bit so I'm hoping a smaller tank will make moving between living situations easier. I'm leaning most towards a 20 high because I enjoy the aesthetics of a taller tank and the 29 is erring on the large side for me. I also enjoy the look of a 15 gallon but think it's too small for the fish I'd like to keep. These fish include: 1 Blue Dot Jawfish 1 Royal Gramma 1 Ocellaris Clownfish 1 Forktail Blenny 1 Yasha Goby I guess my question is if a 20H is suitable to house all these fish. I'm mostly concerned with each fish having enough space to establish its own territory, like the clownfish. I'm also on the fence about the goby because I fear the jawfish might not appreciate another bottom dweller in the tank. Please let me know what you think!

11/20/2017, 11:54 AM	#2
Fiver Registered Member Join Date: Nov 2015 Posts: 365	Personal opinion: - I would knock one, if not two, fish off of your list given the tank size. - I would also vote for a 20 long vs a 20 high, because most fish (and all the ones you listed) use lateral space, not vertical space. (I appreciate that you like the aesthetic of the 20 high; this is just my opinion about the best use of space for fish.) - I think you will enjoy your clown more if it's in a pair. The pair dynamic is very interesting, and, I just find that a tank of all single species looks unnatural/unappealing aesthetically. I think it helps to have a pair/trio/small group of one type of fish among your scattered singles if your tank size and stocking will allow. - I have a yellow watchman goby and lawnmower blenny and they're fine, but I also have a 4-foot long tank. My sense is that burrowing gobies tend to have small territories, so it should be OK. Good luck!

11/20/2017, 03:00 PM	#3
Xandernfs Registered Member Join Date: Nov 2004 Location: STL Posts: 730	When I had my 20H, I had 2 ocellaris clowns, 1 clown goby, and 1 tail spot blenny. That felt like enough for me. I would subtract 2 from that list unless you have a skimmer and want to be doing water changes 1-2 times a week.