Lighting for clams

[fishytime]

Originally Posted by Aquattro

Ya, best to wait, the croceas are more light demanding than others.

actually thats not true.........croceas and maximas are found deeper on the reef than clams like derasas and hippos, which are found shallower, so derasas and hippos and squams may actually require more light than croceas and maximas

[Youngster Dan]

Originally Posted by fishytime

actually thats not true.........croceas and maximas are found deeper on the reef than clams like derasas and hippos, which are found shallower, so derasas and hippos and squams may actually require more light than croceas and maximas

Respectfully, I would disagree. Not through any experience of my own, but simply because I read something different.

I found this to be a really cool article on clams. http://reefkeeping.com/issues/2007-10/jf/index.php

But in relation to the light demands of species of clams, the article states "Croceas live at shallower depths than other Tridacna species, where they receive intense light; so they require more light than the other species when kept in aquaria."

[Aquattro]

Having owned many types of clams, and keeping them all under 400w, I can't really argue with any first hand experience, although hobby lore has reported my statement to be true in many articles. I've also known people that could keep derasas or squamosas under lights that would cause the croceas to fade away.
Not scientific, and yes, the last maximas I swam with were 30ft+ below the surface, but generally people report maximas and croceas as requiring more light..