Beautiful tank, nice work on challenging carpet. I did a Parva carpet that took 2 years to get it from bad to acceptable to impressive. The patience thing is hands down the toughest part of the game.
I am to planning launch either a 90p or a 75p in the not so distant future. In some of your previous posts you seem to feel that a single GRO beam 1000 did not give adequate coverage with your 90p. In your opinion would a single tile drive the slightly smaller 75p properly for "high light". I am an experienced high tech tank guy, so I'm not intimidated by "big" lights (ah, the algae wars I have fought...), but I would love to nail either of these tanks spot on with a great led system.
Thanks for any feedback you can provide.
I think that to get the spread of light, it was necessary to use two tiles, as well as to have that extra amount of light just in case I needed it (for HC, Glosso, etc.) in the future. Now, given that the 75P and the 90P are both the same height that becomes an important factor when assessing PAR at the substrate level. And added to that is the fact that the 75P is 6" smaller in length, that too is another important factor when considering spread. I think one tile would be sufficient, though if you want extra light "just in case" you can always add another one, but one should be sufficient. Really I could have gotten away with one, provided that the edges on the left and right of the aquarium had slow growing, low light plants like Java ferns, etc. But I too have always been a "high light" guy and like to have that extra power. Of course these things are NOT cheap, but they more than do the job. I've reduced my lighting intensity down some after the hack job just to let the plants recover and they're observably doing quite well. So even at 50% intensity each, having two (doesn't double the intensity, as they don't overlap the way they're spaced) of them are still quite effective.
Keep in mind one important thing - LED lighting is NOT what your eyes are used to seeing. You will probably think that they're dim, until after a few days of seeing them at work and eventually your eyes will adjust and you'll realize that it is different but still "bright". And finally, a word of caution - don't let these LED fixtures fool you; you must
have a reliable and constant source of CO2. The GrowBeam 1000's are unusually
effective at what they do, and thus having constant CO2 saturation is really important, otherwise it will be algae hell. I've been in this hobby for a long time (almost a decade?) and I have to say that I was a hard core CFL and T8 man myself, but ever since switching to LEDs I'll never go back. Period. I hope that this helps with your decision?!?