I currently have a tank 150cm x 40cm x 61cm (height). Despite running a ph monitor and pressurised co2, my 2 54w T5's are not up to the job.
I've been looking into LED's and have come across the TMC Grobeam 500's ( of which I would need 6 for the length of my tank) and the Finnex Ray II (of which I can't find any info on how many I would need fo my aquarium)
The Finnex Ray II are the cheaper option but was hoping someone out there with more knowledge/experience of LED's would give me some advice on the what is best?!