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Dinosaur
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actually the reason is because when light shines directly downwards on the clam mantles and u look almost directly down at them also...that's when you see their true vibrant colours..

the problem comes when we place them in our high tanks and we cant everytime climb on top of ladders and stop all surface agitation to look down at the clams... thus when we look through the front plane of the tank...there is an angle between the light hitting the clam vertically and the light from the clam mantles to our eyes...

this cause the difference of colours

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pardon my amatuer drawing ...i think the reasoning is this..

notice the difference in angles when viewing the clam mantle from near the top compared to from the front plane of the glass....and when u look through the glass at such an angle...the quality of the glass will affect the colours even more...

post-7-1071924900.jpg

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actually the reason is because when light shines directly downwards on the clam mantles and u look almost directly down at them also...that's when you see their true vibrant colours..

the problem comes when we place them in our high tanks and we cant everytime climb on top of ladders and stop all surface agitation to look down at the clams... thus when we look through the front plane of the tank...there is an angle between the light hitting the clam vertically and the light from the clam mantles to our eyes...

this cause the difference of colours

so it has nothing to do with the glass? :look:

dino07.gif
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got...the angle makes a difference already.....the glass used will compound the difference....and when u use ordinary glass and view from the front..the colour is way off....

but when u use acrylic or optically clear glass like starphire....at least the glass factor is eliminated or reduced dramatically...

then its up to you to position your clams so that you get the best true colours..hehe

it's angles and glass...i believe...

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so i think u can use good glass like starphire to reduce the glass effect...then then tilt the clam to minimise the angle ..just now the clam was placed flat..almost like putting on the sandbed, thats why the angle through the glass was very big...

so u place them on rocks tilted at an angle and use starphire glass..then will be quite close to the natural colours...hehe

post-7-1071925305.jpg

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Think it's cheaper to start another shallow clam tank than to get a piece of starfire glass leh. The glass cost more that the whole tank plus sump! But there is another option. arclyic relective index is similar to water and looks even better then star fire glass. only bad think is can scratch. But the good thing is the scratches will disappear when in contact with water and the outside can be polish to remove scratches. just get thicker once and polish once every couple of years. ke ke

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Barra. Thanks for the help man, I use the vinega like your said and they die imediately! fun to watch. But did some squiking under water. will the vinegar affect the tank?? hope I wont see the fishes die tomorrow! ke ke..

Errr.... what you trying to eliminate

Care to share? :D

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QUOTE (Dinosaur @ Dec 20 2003, 09:52 PM)

QUOTE (Tanggy @ Dec 20 2003, 09:48 PM)

Barra. Thanks for the help man, I use the vinega like your said and they die imediately! fun to watch. But did some squiking under water. will the vinegar affect the tank?? hope I wont see the fishes die tomorrow! ke ke.. 

Errr.... what you trying to eliminate

Care to share? 

Atapsia

Ok. noted. Thanks. I could only find rice vinegar, will it affect the water??

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Think it's cheaper to start another shallow clam tank than to get a piece of starfire glass leh. The glass cost more that the whole tank plus sump! But there is another option. arclyic relective index is similar to water and looks even better then star fire glass. only bad think is can scratch. But the good thing is the scratches will disappear when in contact with water and the outside can be polish to remove scratches. just get thicker once and polish once every couple of years. ke ke

Starphire 15mm 4x2x2 less than $400 :)

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