Originally Posted by onefish2fish
awesome looking tanks. welcome to the forum.
my question is, your keeping your lights on 13 hours, are you running C02? your also receiving sunlight without algae issues?
i personally wouldnt keep a planted tank light on for more then 8 (9 hours max)
you have to think even dead on at the equator its 12 hours day, 12 night. how old are these setups?
No CO2, I've never thought I needed it as I am satisfied with the plant growth. As you know, the trick is balance between light and nutrients, and while I cannot grow some plants I can grow the ones I want with what I'm able to provide; they don't flower, but they grow well and send out runners. This also leads to your point about the duration of light and algae. Yes, I have algae in the tanks. The otos, Rhineloricaria and Farlowella take care of most of the algae on the plants, except of course for that dreaded brush algae; there is some of that, and I will remove a plant leaf if it is very heavily covered. I had a real bloom of brush algae back in 1997/8, but since then it has been within reasonable bounds. Bear in mind that I am only providing 1 watt per gallon (roughly) plus the daylight, and as I understand those who advocate CO2 this would be far too little light with CO2, but I've no intention of going down that road. I'd rather spend the money on fish!
I used to have the lights on for 15 hours a day, with no problems, because I wanted them on before I left in the morning and later in the evening when I was home to enjoy the fish. Those setups (a 115g, 90g and 70g) ran from 1995 until I moved in 2000 [and believe me, they looked like what these two do now]. I only set up the 90g and 115g. after moving into this house in 2000, but spending all of my non-working time renovating and landscaping, the fish hobby took a very back seat. I kept feeding and water changing, but bought no new fish since 2000, and in 2005 I moved the remaining few fish from the 115g into the 90g and dismantled the 115g. Last year I decided that being retired I now had time to get this going again, so in October I dismantled the 90g and moved it (and the empty 70g) into another room. Most of the plants were purchased then because the previous ones in the old 90g were pretty much gone, as were most of the fish from old age. The Anubias in the left corner of the 70g are three tips from the original plant purchased in 1998 that had taken over about half the 90g by last year. The Echinodorus tenellus came from the old 90g, as did the large Echinodorus plant just to the right of centre in the 90g.