Lava Rock in a Reef Tank

[stephane]

I have 2x 50 pound big lava rock on my tank since
about 6 years in my tank an i have never experience any algea bloom if you see them you could not see any difference between a real and the lava they are incrusted with all kind of spondge

the only bloom i ever experience is now since i convert my bare bottom reef to DSB I begin to ask my self about the purpose of them I hope it will setup soon because i will turn back to bare bottom