Is this PMD? Help me

[gianfranco_bove]

This tridacna is sick of pinched mantle?
Thanks for your help!

 

[OrionN]

That can be PMD. History is needed. Also that clam is in a bad shape and have not grow for a while.

 

[gianfranco_bove]

I've been in the tank for about a year but about a month ago I started to see the cloak pinched on one point and after a few days on another. Since the appearance of the problem I have seen improvements on the first point where the mantle seems to improve.

 

[OrionN]

This is not PMD. This disease does not occur de novo in tanks. Sick clam must be exposed to this disease by contact with other sick clam.

 

[gianfranco_bove]

Okay, that's why I saw improvements. What can I do to treat it?

 

[OrionN]

you should try your best to improve the water and light quality.

 

[minus9]

Agree, no new growth and could be water quality issue compounded by low light.

 

[gianfranco_bove]

Agree, no new growth and could be water quality issue compounded by low light.

If it had been a lighting problem wouldn't he have had any problems right away? It's been in the tank for about a year and I started noticing the problem about a month ago.

 

[ArachnoJoozt]

Light starvation is usually not a fast process, slowly deteriorating the clam's health.
The sand bed is not an ideal place for a maxima clam, do you know how much par the clam is getting? Is there a chance to move it up higher near the light?

 

[gianfranco_bove]

Light starvation is usually not a fast process, slowly deteriorating the clam's health.
The sand bed is not an ideal place for a maxima clam, do you know how much par the clam is getting? Is there a chance to move it up higher near the light?

Unfortunately I don't know what kind of light intensity affects the clam, but I can tell you that until it had this problem there had been a lot of growth on the shell. Shouldn't low brightness also lead to color loss? Forgive me for the questions but this is my first clam. I have a Ate straton pro for lighting.

 

[minus9]

Starvation can happen over a long period of time. The amount of light may be at the threshold of the clam’s minimum requirements for healthy growth and as it grows, it requires more energy (light) to sustain itself. On the reef, there is more energy than the clam needs and it can self regulate the amount of light it needs/requires. There’s never a shortage of light energy on the reef, there’s always a surplus (generally speaking). If a clam happens to settle below its minimum requirements in the wild, they simply don’t survive. That’s why certain species only exist at certain depths. But if you provide the bare minimum, then something happens to the clam like poor water quality, lack of nitrogen or something that compromises the clam’s health in any way, that can be the catalyst that pushes it to the other side.
Maxima prefers a solid surface, but sand is fine, as long as it gets enough light energy.

 

[gianfranco_bove]

Starvation can happen over a long period of time. The amount of light may be at the threshold of the clam’s minimum requirements for healthy growth and as it grows, it requires more energy (light) to sustain itself. On the reef, there is more energy than the clam needs and it can self regulate the amount of light it needs/requires. There’s never a shortage of light energy on the reef, there’s always a surplus (generally speaking). If a clam happens to settle below its minimum requirements in the wild, they simply don’t survive. That’s why certain species only exist at certain depths. But if you provide the bare minimum, then something happens to the clam like poor water quality, lack of nitrogen or something that compromises the clam’s health in any way, that can be the catalyst that pushes it to the other side.
Maxima prefers a solid surface, but sand is fine, as long as it gets enough light energy.

Really comprehensive explanation. Many thanks