Urchin Armies… Is there ever too many?

[i cant think]

Hey guys, hope everyone’s had/having a great weekend! I just got out of work and left with a 4th urchin. Now, I have one question for you guys;
How many urchins do you have and is there ever too many?

I have 4 urchins now, those four are;
2x Lytechinus variegatus - White Pincushion
1x Mespilia globulus - Blue Tuxedo
1x Tripneustes gratilla - Orange Spine/Halloween

I have called my newest one (The Orange Spine) Commander Orange just because I think I’ve got enough to class them as an army. Obviously I’d love more (I doubt I could fit anymore in the tanks, maybe I could get a 5th when Orange moves to my 4’ with the Pincushions) but I feel like there is definitely a limit to urchins and I’d probably say 5 is a great number for a 4’x2’ tank and a 3’x16” tank (2 in the 3’ and 3 in the 4’ tank).

 

[Lavey29]

I have 3 tuxedos in my 3' tank for almost 2 years now. Still going strong

 

[Tcook]

I have two halloween urchins in my 120. They are a little larger than a golf ball. I think 3-4 would be max for me.

 

[i cant think]

I have two halloween urchins in my 120. They are a little larger than a golf ball. I think 3-4 would be max for me.

Here’s my Halloween now he’s in the tank

 

[Tcook]

They are great at mowing down the algae if it isn’t too long.