plantbrain 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.
Regards,
Tom Barr
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
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.
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:
Cheers,
George 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
George Farmer said: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