Question for Kessil AP700 Users

[Todd31]

Is it at all possible that the AP700 can bleach/kill corals that would typically be fine based on PAR readings from my Seneye device?

My light is on a 4 ft 75 gallon tank about 15 inches above the waterline.

If you heard that my parameters were stable and in a good range, is it possible to burn an encrusting montipora and a JF jack o lantern lepto that have been placed in the far corner at the bottom for acclimation purposes under 50% max intensity and estimated 75 PAR? My light program is a 12 hour ramp up/ramp down with maybe 4 hours at peak.

Alk constant at 9, calcium constant at 420, 78 degrees controlled, 1.025 salinity controlled by ATO. Nitrates 5-10, phosphate around .03.

I'm kind of at a loss for dialing these things in.. not sure where to go from here. Wondering if anyone has been in this situation.

Thanks for any input,

--todd

 

[bif24701]

Is it at all possible that the AP700 can bleach/kill corals that would typically be fine based on PAR readings from my Seneye device?

My light is on a 4 ft 75 gallon tank about 15 inches above the waterline.

If you heard that my parameters were stable and in a good range, is it possible to burn an encrusting montipora and a JF jack o lantern lepto that have been placed in the far corner at the bottom for acclimation purposes under 50% max intensity and estimated 75 PAR? My light program is a 12 hour ramp up/ramp down with maybe 4 hours at peak.

Alk constant at 9, calcium constant at 420, 78 degrees controlled, 1.025 salinity controlled by ATO. Nitrates 5-10, phosphate around .03.

I'm kind of at a loss for dialing these things in.. not sure where to go from here. Wondering if anyone has been in this situation.

Thanks for any input,

--todd

These lights are very powerful, also Kessil designed the fixture to push all possible light down into the tank with little waste. Yes it is possible.

What is your lighting schedule? Intensity? Let me see a screen shot. You should acclimate your corals to new lighting. How are you doing this?

 

[Todd31]

Here's what my program looks like... but for the last couple weeks i had the peak at 55%. When i took the PAR measurements a couple weeks ago with the Seneye i was thinking that maybe i wasnt burning them but way under lighting them. So now im not sure what to do. I have a mixed reef with lots of corals that arent happy. Should i knock the peak down to 30% and start over?

 

[Todd31]

the bizarre thing is while im cooking corals in corners i have some zoas stretching for light smack in the middle on the bottom.

 

[bif24701]

Here's what my program looks like... but for the last couple weeks i had the peak at 55%. When i took the PAR measurements a couple weeks ago with the Seneye i was thinking that maybe i wasnt burning them but way under lighting them. So now im not sure what to do. I have a mixed reef with lots of corals that arent happy. Should i knock the peak down to 30% and start over?

That shouldn't be a problem . I would have started at 30% however.

I strongly suspect it's your water. The AP700s don't have hot hot spots like other LED lighting.

 

[bif24701]

Acclimate your corals slowing by increasing by only 5% evey week or two from 30%. After your corals recover.

 

[bif24701]

Acclimate your corals slowing by increasing by only 5% evey week or two from 30%. After your corals recover.

 

[Todd31]

I have hanna and salifert alk tests so im pretty sure im good there. Multiple thermometers to make sure my reefkeeper is accurate. i guess the one double check i dont have is the refractometer. I calibrate it with 35 pt solution each time i use it though. Any other obvious things?

 

[bif24701]

I have hanna and salifert alk tests so im pretty sure im good there. Multiple thermometers to make sure my reefkeeper is accurate. i guess the one double check i dont have is the refractometer. I calibrate it with 35 pt solution each time i use it though. Any other obvious things?

Sometimes it's the not so obvious. What are your parameters?

I think it's a poor conclusion to blame the lights.

How did you acclimate the corals?

 

[Todd31]

i just start the corals on a rack very low in the tank, toward the side. With the jack o lantern and the monti i literally put them in the far corner and they are turning cloudy/white.

Alk 9
Calcim 430
Mg 1440
Nitrate 5
Phos .03 (used to be lower, but ive added more fish... i used to think the nutrient defeciency was causing the coral paling/burning)
temp 78
Salinity 1.025

Ive been staying pretty consistent. I run some carbon in a small reactor and have a bubble magus skimmer that does a good job. nothing really else.

maybe i should get a triton test to confirm water parameters?

 

[bif24701]

i just start the corals on a rack very low in the tank, toward the side. With the jack o lantern and the monti i literally put them in the far corner and they are turning cloudy/white.

Alk 9
Calcim 430
Mg 1440
Nitrate 5
Phos .03 (used to be lower, but ive added more fish... i used to think the nutrient defeciency was causing the coral paling/burning)
temp 78
Salinity 1.025

Ive been staying pretty consistent. I run some carbon in a small reactor and have a bubble magus skimmer that does a good job. nothing really else.

maybe i should get a triton test to confirm water parameters?

I would rule out lighting as a problem for now. Look at your stability and other husbandry issues. Please don't take offense to that.

 

[Todd31]

I don't take offense at all, im just not sure what to fix.

 

[ruth howard]

I have the AP700 over a red sea reefer 350. Here is a screenshot of my program using the android app. I don't have a lot of corals in the tank. I am going very slowly with this, however, if you can zoom in on the pic of my tank, I have a jack-o-lantern on the top of the left rock structure. I hope this helps. I just modified one of the "quick set" options to suit my work hours.

 

[USMC 4 LIFE]

Following for info

 

[nbagnardi]

by any chance could it be ALK burn? ALK burn can shock a coral to death. did you by chance test the incoming water? i never do, but i've lost some monti's from similar scenarios

 

[Todd31]

Your in between points are a lot lower than mine... maybe i have too long of a duration near my max.... i'm going to send out my water for a triton test, want to see if theres anything funky going on.

 

[Todd31]

Hmmm, thats something to think about... maybe if they are used to 7 ALK and then i put them in my 9 ALK system that would be bad...

 

[ruth howard]

Are you using the ipad or android app. I have used both and like the android a little better. There are sliders at each set point for adjusting red and green individually.

 

[Todd31]

I was having problems connecting with the android app so im back to the ipad. Ugh, this was a whole scene ive been on with Kessil support a lot. The android was more polished but my light was flickering off/on sometimes apparently not getting a 100% connection. It seems to work better with the ipad app.

 

[bif24701]

I've been acclimating my corals for several months and this is where I have found the sweet spot for them. They are responding well. I was very conservative getting here though.