|01-25-2013 07:35 AM|
A lot of your suggestions are great and I do appreciate them!. Increasing nutrients and dropping the light level a bit is exactly what I did.
A small quibble about the lights:
They're 24W T5s, and they're 10k bulbs. The plants seem to be going gangbusters under them. The problem was too much light and not enough nutrients (and it's been solved, I think!).
I'm new to planted tanks, and the nutrient balance and CO2 aspect of it is not something I'm familiar with. But I've run reef tanks for years, and I do know something about lighting. Running with lights other than 6500K does not mean algae blooms. Corals can (and do) photosynthesize just fine under much bluer light than 6500K, there's no reason your plants can't photosynthesize under that light too.
What's important is PAR: http://en.wikipedia.org/wiki/Photosy...tive_radiation The graphs on that page should give you some idea of what spectrums work best for photosynthesis.
I'm not saying there's anything wrong with 6500K lights, but it's not the only option.
|01-25-2013 06:55 AM|
Check your bulb spectrum. If its not even close to 6500k, you will be making an algae farm no matter what you do.
I have 2 X15 watt T8's over my 10 & it is totally thriving. The water is crystal clear with NO ALGAE on plants or glass. I run 1 bubble every 2 to 3 seconds with a high end diffuser. I run 2X 6500k bulbs . Algae will out perform your plants without correct lighting spectrum , CO2, dry ferts , all need to be balanced as well as good filter flow with some surface agitation. Some surface agitation does not mean hang on the back filter. Small ripples that allow some gas exchange.
Your nitrates need to stay above 10ppms & PO4 should not crash either. PO4 should hold between (.5 - 2ppms). Added K & Fe as well as trace with boron.
If you have high nitrates out of tap you could use or cut in R/O water to reduce in comming nitrates but nitrates should stay above 10ppms at least if not 15 or more ppms.
40 to 50% water change at the end of the week for a tank reset.
Final word. Your lights are probably the wrong spectrum & too strong , your CO2 dose is off or poor diffusion. You need to stay on track with NO2, PO4 & dose EI every week. If ph dose not drop into the acid range your not getting enough CO2 into the water. Keep nutrients up drop lighting a little & check the spectrum, dose EI. my 2 cents
|01-25-2013 05:32 AM|
I always hate it when people don't update threads to say what happened, so.... it worked!
I left the CO2 high, reduced light to 1 T5 bulb (which slowed, but didn't stop the algae), and then I introduced more fish and started dosing Excel. I'm going to look into other fertilization schemes, but just these minor changes have made a huge difference.
Yeah the glass is cleaner, but look at the substrate and on the plants themselves. Drastically reduced algae.
|01-08-2013 05:15 AM|
I cranked the CO2 back up and reduced the light to one bulb. We'll see how it goes.
In the meantime, I'll see if I can find a fertilization scheme I like.
|01-07-2013 02:42 AM|
More light is most definitely NOT a positive here. You have to have a balance of light, CO2, and nutrients.
Think of it as baking a cake. You have to have a balance of flour, sugar, eggs, chocolate, etc. If you go hog-wild and add 12 eggs to one batch of cake mix, that's gonna be one crappy cake.
Same thing here. 96w of lights over a 10 gallon tank is your problem. To put it in perspective, I have only about 80w over my 40 gallon tank. Lower your light output to one or two bulbs. Dose ferts. Keep up the CO2.
|01-07-2013 12:39 AM|
|01-07-2013 12:34 AM|
I'm fine with bringing the CO2 back up and reducing the photo-period, but if the point is to have the plants outcompete the algae maybe the solution is to leave the lights, and the high CO2 and simply add more plants.
I'm sorry if I come across as resistant to reducing light, this is the first planted tank I've tried after many years of reef tanks. I'm used to more light always being a positive.
|01-06-2013 10:18 PM|
|01-06-2013 02:41 AM|
I'll try reducing the light/co2 cycle to fewer hours per day and see if that helps. I've already reduced the CO2 flow, but I can bump it back up if it would help. I was at ~2 bubbles/second, and reduced to 1. I'll look up the model of my bubble counter if people want to do a real comparison, I'd imagine the numbers don't translate between different models.
|01-05-2013 10:06 PM|
A tank isn't like a jigsaw puzzle where you can add pieces as you go along. You have aquasoil and high light without co2, that's a algae incubator, it just had to develop.
BTW any stirring op of the aquasoil will realize ungodly anounts of ammonia etc into the water column so if you did that it would certainly make it worse.
I would do lot of water changes, trim, cut lights back to 4 hrs, use carbon or other organic removal media and yes use co2.
|01-05-2013 09:53 PM|
I'm fairly new at this as well, but I've had my fun battling algae and it's finally on the way out. With those two bulbs running on a 10 gallon tank, you pretty much have the sun right above your tank. You currently aren't adding enough CO2 and ferts to help the plants out-compete the algae.
I would shade that light, or lift it up. Window screen works well, or get some floaters. Probably both.
|01-05-2013 09:48 PM|
|tropicalmackdaddy||How much co2 aree you injecting, and how? And for how long?|
|01-05-2013 09:41 PM|
Creekbottom: They're 24", 24W bulbs. I believe that's HO. I can't run a single bulb.
Does it make sense to throttle the CO2 back instead? My gut feeling is that I've eliminated CO2 as a factor limiting plant growth, so my main drivers are the nutrients in the water and the light. If the plants are able to outcompete algae at a lower CO2 level, maybe it's worth trying to find that level rather than reduce light. I'm worried I'm going to stunt plant growth if I throttle the light back too much.
|01-05-2013 09:27 PM|
|Merth||If I understand correctly you need a balance of lights, CO2 and ferts. If any of the above are out of whack you get algae. Seems as if you have high light, CO2 and no ferts so the plants use what they need and then the algae takes the rest and runs with it. Definitely still a noob here but I think you need to either greatly reduce lighting or add ferts to achieve balance.|
|01-05-2013 09:15 PM|
|creekbottom||Are your T5's HO or NO? Can you drop it down to one bulb?|
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