Hmmmm, so, here is another one I could not resist. Soooo,if we use the supposition that, less light does slow plant growth....one would expect that more light speeds plant growth. If you look at algae as a plant, then, light would have some impact on the growth rate of algae in theory. From my own tanks I have seen this. Yes, plants grow slower in a low light tank......and if that tank is prone to algae, the algae will grow slower too....but, it still grows. The problem comes about when the slow growing algae still outgrows the slow growing plants. Similarly, algae will grow faster in a higher light tank, as will your desired plants. So, which grows faster? The point being, I believe Mark is correct in stating that day length does not matter so long as your tank is in balance to begin with (ie, the desired plants are outgrowing the algae). If your tank is out of balance to start and the algae is outgrowing the plants, then, more light will only make this effect worse in theory, and in my own playing around I have seen this too. Where is Eric in all of this.....he has loads of plant experience too......more data please. Clay -----Original Message----- From: Mark Pearlscott [mailto:mark@pearlscott.com] Sent: Thursday, March 17, 2005 11:23 AM To: Greater Seattle Aquarium Society member chat Subject: Re: [GSAS-Member] Algae control I'm not sure that day length matters too much. I have experimented in the past with short (8 hours) and long cycles (up to 16-18 hours)... and I didn't notice any discernible difference in plant or algae growth that I could attribute to a change in the light duration. Now when I say discernible difference, I mean that I didn't see algae grow more/plants grow less, or vice versa. Less light does equal less growth total. MTC. Mark P. A JACOBSON wrote: >Just a thought. How long do you leave your bulbs on each day? I've >been told that algae likes longer "days", so my tanks are on a strict 11 hour timer. > ----- Original Message ----- > From: John Ruhland<mailto:john@drruhland.com> > To: Greater Seattle Aquarium Society member chat<mailto:gsas-member@thekrib.com> > Sent: Wednesday, March 16, 2005 11:48 PM > Subject: Re: [GSAS-Member] Algae control > > > Paul, > Thank you for your response. > It is a 72 gallon with many plants, 8 baby daffodil Brichardi (from > Susan), and one Leporinus fasciatus, about 10 inches long. > pH 7.4 > KH 80 > GH 80 > Nitrite, Nitrate, and ammonia have always been very low, usually not > even measurable. > > I have added small amounts of epsom salt in the past, and still add a > small amount of rock salt, about 1 tbsp with every water change (about > 15-20 gallons). > I have also added SSKI (Iodine) and Oregon Grape Root extract (a > powerful natural antibiotic I make), but this was some time, and > numerous water changes, ago. > I added a multi vitamin (Kent Zoe), and buffered Vitamin C, and a very > small amount of essential fatty acids (Kent Zoecon), but that was some > time ago as well. > After a water change 2 times ago, all the small snails mysteriously > died. That might hold the key to the problem. I did not use any new > sponges, soaps, or any cleaning > materials. I've stopped using a small amount of Aquasafe that I had > used in the past to remove the chlorine. I do not recall if I used > Aquasafe at that water change two > times ago, although I think I did use it. Months ago I used Ichstop in > that tank, the only other medicine I have used up until now. > > Lighting began as twin 48" bulbs. Then I turned them off for over one > day. Then I switched to a new light containing 4 65 watt twin tubes. > (My reading suggested changing lighting, either decreasing or > increasing, could eliminate algae. It would probably require turning > the lights off, > or even covering the tank, for three days to make a difference.) None > of the light changes helped. > > Let me know if any other info would be useful to know. Regards, > John > > > On Mar 16, 2005, at 10:13 PM, Paul M Wallace wrote: > > > John: > > > > It has been several years since I had green water(result of a pH down > > product) and it seems that GW is aggravated by ammonia. With that > > said you probably have an imbalance of nutrients. The good news is > > that when balance is restored, the GW will go away. > > > > So I am curious about your water parameters. How much light, are you > > adding carbon or nutrients? > > > > -Paul > > > > In the past few weeks, I've had an algae problem as well. Rather than > > coating any surfaces, it simply turns my water green. While it is a > > pretty color, I am unable to see anything more than about 4-5 inches > > from the glass. I've added two filters to the original filter. The > > pleated paper filter that came with the Magnum canister filter, and > > that I was told would turn water crystal clear, has not filtered out > > anything, so it must be only a few microns in size. Besides the magnum > > filter, I have a Magnum HOT, and a Marineland Emperor with Bio-wheel. > > At first I changed the water every day or two and added a bit of > > salt, thinking that would slow the growth of algae, but since that > > did not show much improvement, I decided to wait it out. Any > > recommendations would be helpful. Anita recommended getting tiny > > organisms that would eat the algae. > > > > Fortunately, the fish seem to be doing alright. > > Thank you, > > John > > > > > > > > It is the tank where I put most of the plants I got at the plant sale > > as well. > > > > > > > > > > _______________________________________________ > > GSAS-Member mailing list > > GSAS-Member@thekrib.com<mailto:GSAS-Member@thekrib.com> > > http://lists.thekrib.com/mailman/listinfo/gsas-member<http://lists.thekr ib.com/mailman/listinfo/gsas-member> > > > > > > > > Dr. John F. Ruhland > The Natural Health Medical Clinic > 4002 - 25th Avenue S, Seattle, WA 98108 > 206-723-4891 > www.drruhland.com<http://www.drruhland.com/> > > _______________________________________________ > GSAS-Member mailing list > GSAS-Member@thekrib.com<mailto:GSAS-Member@thekrib.com> > http://lists.thekrib.com/mailman/listinfo/gsas-member<http://lists.thekr ib.com/mailman/listinfo/gsas-member> >_______________________________________________ >GSAS-Member mailing list >GSAS-Member@thekrib.com >http://lists.thekrib.com/mailman/listinfo/gsas-member > > > _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member