Urchin grows fast

[Carl C]

This urchin is growing fast

 

[Lasse]

Yea - and it is a prove that it does what it should ;) Your algae is converted into urchin flesh instead and they are many times more beautiful to look at - compared with algae all over :p

Sincerely Lasse

 

[robbyg]

The long spine urchins are the best algae eaters I have ever seen. They will mow down a 100 gallon tank with GHA in about two weeks. The only downside is they will eat the coralline algae also.