thank you for the replyplantbrain said:Yes, I have 1.8W gal at 80cm from the bulb to the lower plants without any issues.
You have more than enough light, maybe more than you bargain for.
Do you mean 6 x 54w T5? 4w lamps are very small...jarthel said:I'm considering 6x 4W T5 HO for a 70cm (h) tank. I plan to have a 8cm thick substrate. Will this work? thank you
yeah. I meant 54W. just want to clarify: you meant 2x T5 HO. right?George Farmer said:Do you mean 6 x 54w T5? 4w lamps are very small...
I had success with 2 x 54w T5 over a 70cm tall tank (370 litres). With good reflectors 2 x T5 is all you generally need for most plants, even at 70cm. Good nutrients and circulation are also very important.
I'm a first timer and I was just considering the equivalent power output based on 2x 150W halides.ceg4048 said:I'd be much more worried about how to get enough CO2 to penetrate down to the bottom of a 70 cm high tank while using such high spectral energy levels. :silent:
So I can exclude HC and glosso. right? thanks againGeorge Farmer said:In response to a PM, but it's worth sharing.
You should be able to grow most foreground/carpeting plants with 2 x 54w T5, providing CO2/nutrients and circulation are up to scratch.
Because of their position in the aquarium, low plants tend to receive the least amount of flow and CO2, so consider this when positioning your filter outlets etc.
Some foreground plants are more demanding than others too, so consider species selection too.
Not necessarily. If they're not shaded by other plants, and you have good CO2/nutrients and circulation down there then you may be ok.jarthel said:So I can exclude HC and glosso. right? thanks again