Originally Posted by PRichs87
I have a 7500K T8 tube, only one.
Tank is not "heavily" planted, but it has quite a few in it.
I use API Leaf Zone when I do my PWC weekly and I add one more dose mid week.
Lights are on for 10 hours.
I was back at the LFS yesterday, and noticed that the plants did have the same algae, shame on me for not rinsing my plants in a warm salt bath before adding them to my tank!
Also I DO have ICH! So I am currently treating with a half-dose of Aquari-Sol.
Nothing too far out in this, so my suggestion would be first to get a new tube. I didn't ask how long the present tube has been running, but they do lose intensity as they burn, and algae frequently (= always) takes advantage and will increase or be more of a nuisance with less intense light. T8 tubes should be replaced about every 3 years.
But aside from this, I am intrigued by the kelvin of 7500K which is rather unusual. If it were me, I would get a daylight tube with around 6500K. Measure the length of the present tube (excluding the end pins) and that is what you want in a "daylight" or similar; GE, Sylvania, Phillips all make these, whatever they may individually call them. They are not expensive, a couple dollars at hardware stores. Algae will survive (whereas plants may not) under any light, which is one reason the actinic (blue) lights of marine tanks do not work well with planted tanks. The 7500K may be assisting the algae a bit.
I would replace the tube, remove the algae manually as best you can, and see what happens. I would not at this point reduce the light period. But one other suggestion would be to change fertilizer. Here again, algae can manage with anything (or none except natural organics in the tank), whereas plants have specific needs for 17 nutrients. API Leaf Zone only contains iron and potassium (according to the info on their website), and it is unlikely the others will all be available in sufficient quantity solely from the tap water, fish food and waste organics. I recommend Seachem's Flourish Comprehensive Supplement for the Planted Aquarium as the best in my experience. I think you will use less of it than you are with Leaf Zone; 1/2 teaspoon (2.5 ml) of Flourish once or perhaps twice a week in a 30g is it. It is highly concentrated.
Dose the fert a day after the water change; conditioners that detoxify heavy metals will detoxify the heavy metals in a fertilizer, and some of these are important plant nutrients (iron, copper, zinc, manganese). Conditioners generally lose their effectiveness after 24 hours, so dosing the fert the day following a water change is recommended. If a second dose is deemed necessary, 3 days after that works to spread them out.
Aquari-Sol is fine for the ich. At half-strength it should pose no problems, but if you notice stress esp from the corys, do a partial water change. I have had corys and some catfish react very negatively to Aquari-Sol, though that was at full strength.