Indicator of PAR level?

[bnord]

Question to the group - with the following background

- a 180 (Cade) lit by Gen5/T4 hydrid
- MOL 14 months of age with water
- when new, had a friend read the PAR at @ 350 on surface, 270 at rock level. Have not read it since, so assume this is only a starting place
- good thick coralline on all the rocks, several varieties, had a KB rock added @ 3-4 month of age

But for some time we have this clear height level of coralline on the back glass. Sorry the tank photos are better with the T4s on, but i missed that 3.5 hour cycle

Have a sister tank - 90 lagoon - with similar light set up with similar phenomenon - 3rd picture down, but this has coralline on gates to the overflows.

So is it possible that this line across the back is an indicator of PAR sensitivity of this coralline strain? It has never been higher than this.

Had my finger on the buy/trade in from BRS but hear stories of unreliability on the unit - will see.

Edit- so have others seen their coralline only go so far up the back like this? is it possibly too high a PAR above that line?

 

[BanjoBandito]

If I was after a usable PAR meter, I'd be looking at those Seneye units. They seem to test out pretty well in terms of accuracy.

 

[gbroadbridge]

If I was after a usable PAR meter, I'd be looking at those Seneye units. They seem to test out pretty well in terms of accuracy.

I have a seneye v4 SUD and it reads high which is a known problem.

If I multiply the Seneye reading by 0.6 it's pretty close to an Apogee MQ510

 

[BanjoBandito]

I have a seneye v4 SUD and it reads high which is a known problem.

If I multiply the Seneye reading by 0.6 it's pretty close to an Apogee MQ510

Huh. The BRS gang, and the greater youtube gang seemed to give them the thumbs up on accuracy.

 

[gbroadbridge]

Huh. The BRS gang, and the greater youtube gang seemed to give them the thumbs up on accuracy

Last time I looked, that was a pretty old video.

The V4 SUD had the issue that mine has.

I believe that the V6 with appropriate firmware corrects the problem, but there is no update for mine hence the 'correction' factor.

Anyone buying one would want to make sure it is a V6