Sea Urchin.

[Harls]

Whats A nonvenomus sea urchin that i can keep in a 15 gallon tank. if 1 can

[unleashed]

most are venomous and get fairly big........

[cocoa_pleco]

i used to have a non venemous one that likes to be handled, but they need bigger tanks than a 15g

[Harls]

i was now thinking of converting the 35G. now i have in theirlike crushedshells from when i got it as it was a saltwater tank before i got it can i just use that or do i have to add sand

[cocoa_pleco]

ideally you should use aragonite or live sand

[Harls]

cocoa pleco What Type was it???

[cocoa_pleco]

i cant remember, he was labeled was just a urchin, but he was brown and hard, and had thick pointy arms, and was safe to handle

[Tigerbarb]

If you want a sea urchin, you will need lots of live rock and lots of substrate.
I have seen active sea urchins in 15g tanks, so I think it would be fine. Just avoid urchin nipping creatures.

[unleashed]

cocoa, your urchin sounds like a pencil urchin of some sort

[cocoa_pleco]

cocoa, your urchin sounds like a pencil urchin of some sort

thats what i thought, i bought him for $10 at a store that was terrible at labeling their stuff. he was fine in my old 10g (this was 3 years ago) and when i tore down the tank because i tried a condy anemone with incandescent fixtures (i was stupid then), he was the only survivor and went to a good home

[Tigerbarb]

Does this mean that if I wanted to, Icould keep an urchin in a 10g?

[unleashed]

yes you can, but it is not advised.

Water quality is very hard to maintain in 10g tanks and bad water quality will rapidly kill an urchin. Once the urchin dies, there is a high chance that it will kill anything else that is living in your tank

[cocoa_pleco]

yeah, that was one of my largest beginner mistakes, uchins should be 29g+