I picked up the green/purple tips one about a week ago but the rest have been growing from little frags for years. I know for some people they grow like weeds but in my tank they are relatively slow growers. Lighting is ATI blue+ and an actinic strip.
Pic of the blue hammer with a yellow filter.
And with an orange filter.
Let's see some other hammer gardens.
Pic of the blue hammer with a yellow filter.
And with an orange filter.
Let's see some other hammer gardens.
