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framerguy · 09-13-2007, 07:07 PM

I have a beautiful tridacna under 150w MH in a 21" deep 75g. He's probably about 24" from the light in 16" of water. That's about maximum depth under this light to have a clam THRIVE IMO. Calcium is also very important for clams. Remember, clams require high intensity light as most live in shallows under full sun. A tank deeper than mine would need 250w MH or move the clam closer to the surface, but I think MH is necessary for them to thrive.

09-13-2007, 07:07 PM	#3 (permalink)
framerguy Manta Ray Join Date: Jun 2007 Location: Mount Airy, Ga Posts: 3,648 View Gallery Karma Komment Add yours!	Re: Recommended lighting. I have a beautiful tridacna under 150w MH in a 21" deep 75g. He's probably about 24" from the light in 16" of water. That's about maximum depth under this light to have a clam THRIVE IMO. Calcium is also very important for clams. Remember, clams require high intensity light as most live in shallows under full sun. A tank deeper than mine would need 250w MH or move the clam closer to the surface, but I think MH is necessary for them to thrive. __________________ ___________________________________ Greg All time fav quote: "Now and then it's good to pause in our pursuit of happiness and just be happy."-Guillaume Apollinaire "Being happy can be as easy as deciding to be!"-Greg Kimsey (framerguy) Still Workin' on it! 375gDT built in wall, Gargantuan DIY Beckett Skimmer, 100g sump, Sequence Hammerhead closed loop, 75 gallon seagrass/mineral mud refugium, 55 gallon crushed coral/live rock refugium, 30 gallon DSB/ cheatomorpha refugium, algae turf scrubber, DIY calcium reactor, DIY kalkwasser mixer, DIY light system w/4x 250MH & 4x54w T5, etc, etc, etc... chronicles-akwareum