12-06-2008, 09:58 PM
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I have a 55 gal tank with 2 65 watt cf lights that stay on for 10 hours a day. Temp is 78 deg, ammonia 0, nitrite 0, nitrate 15. Water is very hard with a ph of 7.I use Flourish and Flourish Excel, as well as potassium. I also use API root tabs. Substrate is about 2 inchs of gravel. Most of my plants are swords, with a few crypts and some java fern. My plants have been doing well for months now, till all of a sudden the leaves start dying from the tips down. It is a slow die off affecting a few leaves at a time.I am at a loss , and any help would be greatly appreciated. Thank you in advance.