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Good to hear different views, my tubes are only 6 months old, can't see any blackening out yet. I'll keep an eye on the ends for blackening out but hopefully they'll last me a little while yet.

Probably a simple one, but just wondering how often it's recommended to replace your tubes when used for about 10 hours per day? Thankyou.

Hi Steve, thanks for the reply, I would definitely be interested in hearing how you installed the T5 unit.

Thanks again for your advice ceg4048, and Ade. I think I'm coming to the conclusion that the biggest deficiency in my set up is fertilsation of my plants (some of them have now started turning white, I suspect because there aren't enough nutrients!). I've read the very informative article on...

Can you reccomend a fertiliser that contains nitrate and phosphate?

Thanks, I've been meaning to do a bit more research on the nutrient side of things so I'll look into that. Have seen conflicting information about measuring CO2 levels, the consensus here seems to be that pH isn't very good, and the dropper method seems to be the way forward. Can you reccomend...

I'm pretty new to planted tanks. My set up so far is as follows: T8 lighting 2 x 40W tubes, 10 hours a day, with reflectors supplied with the unit. Pressurised CO2 used to bring pH down from 7.4 to 6.9 Flourite substate and JBL Ferropol fertiliser (when I remember!). Growth seems a little on...