Is this bleaching or from shadowing?

[Jake_the_reefer]

My montipora looks fine under blue light but I decided to flash my light in the tank and I noticed the underside of the coral that is away from the light has turned pure white. Is this bleaching, dying or normal? How can I fix this?

Nitrate 10
Nitrite 0
Phos under .05 and over 0
Ammonia 0
Calcium 440
Alk 7.4 (about to start dosing)
Temp 78
ai prime on david saxby setting 8 inches above water

20g breeder tank. Monti is center of light middle height and high flow fed 2x a week reef roids and amino

 

[VB313]

Just lost mine looks very similar check for Montipora eating Nudibranchs on the underside

 

[Jake_the_reefer]

I'm assuming possibly too much light? Or not enough flow. The damage is on the half pointed away from the powerhead

 

[Jake_the_reefer]

Just lost mine looks very similar check for Montipora eating Nudibranchs on the underside

I dont see nudis. It's been here for 4 months no coral goes in the tank without a 30 min dip.

 

[Jake_the_reefer]

Looks like top is getting white patches too

 

[Jake_the_reefer]

Nvm... I see nudibranch

 

[Jake_the_reefer]

How do I kill them will they hurt my acropora, lps or softies? I only have the one monti

 

[Dierks]

Just for the record what do you dip your corals in? If you are doing a 30 minute dip and it made it through I am curious the brand.

 

[Jake_the_reefer]

Just for the record what do you dip your corals in? If you are doing a 30 minute dip and it made it through I am curious the brand.

Seachem reef dip. I do 15 to 30 mins on all my corals. About 30 frags and never had any stressed corals.

 

[Jake_the_reefer]

I have some dip going now heres a close up pic

 

[Jake_the_reefer]

All adult nudis are dead for sure. Eggs are a different story. I scrubbed the dead spots with a tough toothbrush in hopes to get them off. How often should I do dips...

 

[VB313]

Bingo..... yeah man I know your frustration I dip scrub and check everything with seachem dip never seen a nudi before or after the dip I lost 3 monti frags I kept putting it off as bad lighting got frustrated and asked a LFS owner fornhelp and he asked to to check under the monti for them I eventually lost everything But a small frag I’m nursing back now

I was advised to frag any dead spots off coral and use Bayer complete insecticide instead of iodine based dips
10-15 ml per cup literally looks like milk soak for 15 minutes tops scrub with soft toothbrush and rinse well in fresh saltwater before placing back in tank and repeat every 3 days

 

[VB313]

How do I kill them will they hurt my acropora, lps or softies? I only have the one monti

No Montipora eating Nudibranchs are to my knowledge only Montipora pests your other coral should be fine

 

[VB313]

Oh and blast the hell outa the frag during dips with a turkey baster I even had to remove one with tweezers for what it’s worth I left 3 adults in the Bayer dip afterwards they still wiggled the next day when I dumped it I’m convinced they are immortal

 

[HB AL]

All adult nudis are dead for sure. Eggs are a different story. I scrubbed the dead spots with a tough toothbrush in hopes to get them off. How often should I do dips...

I would scrub the dead/dying areas every day for a week then smother superglue over the dead/dying areas you scrubbed.

 

[Jake_the_reefer]

Oh and blast the hell outa the frag during dips with a turkey baster I even had to remove one with tweezers for what it’s worth I left 3 adults in the Bayer dip afterwards they still wiggled the next day when I dumped it I’m convinced they are immortal

I'll do that next time! I already have it back in my tank on a frag rack and no longer on the rock. Will the monti grow over the dead spots or will it no longer grow in that area?

 

[VB313]

I'll do that next time! I already have it back in my tank on a frag rack and no longer on the rock. Will the monti grow over the dead spots or will it no longer grow in that area?

Not sure honestly ....just gota give it time

 

[Jake_the_reefer]

Not sure honestly ....just gota give it time

Jusy checked.. already moving nudibranch! It was sitting 15 mins in a triple dose of dip... would bayers insecticide be better???

 

[HB AL]

I'll do that next time! I already have it back in my tank on a frag rack and no longer on the rock. Will the monti grow over the dead spots or will it no longer grow in that area?

It will regrow over the dead spots.

 

[VB313]

Jusy checked.. already moving nudibranch! It was sitting 15 mins in a triple dose of dip... would bayers insecticide be better???

I’m telling you they are immortal