Does low par leads to rtn?

[sticksreef]

Hello everyone so i have some acros that are rtn one at a time. The alk is stable since intest everynight and dose with a dosing pump.

So my question is: does sps rtn when kept under 130 par (just got a par meter)

Fun fact: lightning is aquatic hybrid t5 and 2 xr15 with difussers at 50% (one mili even bleached before, yes turned white) mounted at 12”high

Its a 36 long 21 tall aquarium and the parameters are:
Alk 8.5
Nitrate around 5-10
Phos around 0.05 - 0.13
Calcium 410

I just raised the intensity on the radions to 60%. Should i raise it at once till i hit the required or slowly raise the par?

 

[Jinko]

Really depends on the acro, some prefer low light and some prefer high light.

I would say 130 is too low for most acros though.

Slowly increase the intensity of your lights otherwise you will just cause them to bleach.

 

[reefwiser]

It causes a coral to be unhealthy. Which there fore leads it to be open to disease.

 

[Makers Marc]

I guess I also want to know if a slow acclimation over a month i from say 100 par to 200+ par is gonna cause issues?

Ive been forced to start low bc my AP700s arent so kind to new corals coming from t5s only.

 

[RCS82]

I think some pics would help and some more info. You're running 4 bulb t5s with the radions, only 130 par? Is that at the top, mid level? Bulb combo, tank dimensions, age of tank?

 

[jda]

That is too low. The only coral that you mentioned was A. Millepora? If so, those need 300+ to really thrive and I would expect some STN at least on the underside with anything less than 200 PAR.

Make sure that you are applying any kind of correction factors and stuff to your new PAR meter. If it is Seneye, then make sure that it is perfectly perpendicular since they are a real pain unless you set up a perfect kind of system like BRS used in their video. It is good to know if you are chasing the right number, or not.

 

[sticksreef]

I think some pics would help and some more info. You're running 4 bulb t5s with the radions, only 130 par? Is that at the top, mid level? Bulb combo, tank dimensions, age of tank?

Here is a pic of my tank, the highest point is around 6-7 from the surface and around 18 from the light, that point was measuring about 130 - 150.

I am using a bulb combo of: actinic>blueplus>coral plus> blue plus

That is too low. The only coral that you mentioned was A. Millepora? If so, those need 300+ to really thrive and I would expect some STN at least on the underside with anything less than 200 PAR.

Make sure that you are applying any kind of correction factors and stuff to your new PAR meter. If it is Seneye, then make sure that it is perfectly perpendicular since they are a real pain unless you set up a perfect kind of system like BRS used in their video. It is good to know if you are chasing the right number, or not.

I am using the apex pmk par meter, and indeed i believe it started dying from the underside. i will try to slowly increase the par readings

 

[jda]

Up the T5 run time by an hour every few days until you are at 10 hours a day. Then, use the LED to fill. The T5 alone should be able to handle most of the lighting needs if you run them for long enough.

 

[sticksreef]

Up the T5 run time by an hour every few days until you are at 10 hours a day. Then, use the LED to fill. The T5 alone should be able to handle most of the lighting needs if you run them for long enough.

2 bulbs are already running 8 hours the other 2 bulbs run for 5. And my radions are running 14 hours ramping up and down at 60% for now.

 

[jda]

You will have better results if you switch your paradigm and let the T5s do the heavy lifting.

 

[Seminoles76]

Those numbers seem pretty low for 2 XR15s at 50% and 4 T5 bulbs. I guess those diffusers are really knocking PAR down.

I’d continue to raise XR intensity until
You get PAR at desired level.

 

[RCS82]

The above responses are spot on and what I was thinking. You have a great lighting setup. All your corals seem to be from the middle down, could you lower your fixture a bit?