refunerium.....
...priceless
it doesnt matter whick rock you put in there the chances of the orange or green algae wont be any higher. algae is like a plant that will grow when the ecosystem is just right for it. i have had rocks with maroon algea for 2 years go into another tank of mine then start to get purple and green and the new color algae starts to cover the marron algae. thats all i know just from my own experience.
just so you know i can't even pronounce that refuge word let alone spell it. i just say fuge or refuge.
"Sow an act and you reap a habit; sow a habit and you reap a character; sow a character and you reap a destiny." Charles Reade