How many Radions for a 75G tank

[Billyreef-ita]

Hi everybody,
I moved from a 40G tank to a 75G tank (48’’x20’’x20’’) with sps predominantly.
I am now lighting it with 2 X15 G6 Radion and a X30 G6 Radion (the X30 is placed in the center and the two X15 on each side).
The lights are positioned 6’’ high from the water and run at 80%.

I wonder if this is enough or do I need additional lighting to get good results for the sps. As of today I grow only Montipora but I would like to start with more difficult SPS.

Thanks

 

[GARRIGA]

perhaps rent a PAR meter

 

[Billyreef-ita]

That would be the best solution, however I cannot find anybody in Rome doing this service.

 

[Bruttall]

Here is a low priced option Par Meter. I use this one on my tank.

PARwise USB Light Meter

All the Metrics Needed to Make Informed Decisions about your Aquarium Light Compatible with any light source Can be used wet or dry Works with Windows PC, macOS*, and Android devices Measures multiple lighting metrics: PAR (PPFD – Photosynthetic Photon Flux Density µMol/m2/S) Kelvin (Color...

www.bulkreefsupply.com

Also I won't buy Radion lights. They are over priced and under powered in my opinion. I use 4 Reefi Lab uno 2.1 with 90 degree relfectors over my 8ft 300g tank. At $480 each they are half the price of radion with better light spread thru 9 channels and more over all wattage. xr30 g6 210 wats, reefi lab 270watts.

My stylo and plating monti 1 year apart.

ReeFi Uno 2.0 Pro – ReeFi Lab

www.reefi-lab.com

Good luck to you.