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post #1 of 11 (permalink) Old 04-05-2010, 08:07 PM Thread Starter
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Is this enough?

I have high light, adequate co2, and using substrate tablets in a 29g tank.. may start dosing with some flourish excel. Is this going to be enough? Do I need all the liquid/powder ferts and massive water changes for lush plants (I'd rather not)? I have some bad brown cotton ball like algae choking my HC and Cabomba.. What do you guys think?
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post #2 of 11 (permalink) Old 04-05-2010, 08:40 PM
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Need some better information than you've given so far-

Eactly what are your lighting and CO2 setups like?

If you're running high light over your tank, then yes- you need to provide a balanced supply of macro and micronutrients (including a solid level and well-distributed CO2) in order to grow healthy plants. Otherwise they'll end up nutrient deficient and algae will take over- which is what it sounds like is happening already.





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post #3 of 11 (permalink) Old 04-06-2010, 12:45 AM Thread Starter
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I'm running 5 watts a gallon (150w halide) and two bottles of diy co2 which are pumping out the co2 I have tiny bubbles flowing throughout the tank constantly.
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post #4 of 11 (permalink) Old 04-06-2010, 12:47 AM Thread Starter
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thanks by the way
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post #5 of 11 (permalink) Old 04-06-2010, 12:50 AM
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I strongly doubt that you can produce enough CO2 to keep up with that much light, and definitely not with DIY CO2. You need a drop checker with a 4dkH solution to verify how much CO2 is actually getting absorbed into the water column.

Even 75 watts of MH over a 29gal would probably require pressurized CO2 to get the levels high enough.

Personally, I'd seriously lower that lighting, go with a 2 bulb T5HO fixture if you're sure you want to stick with a high tech setup, or 2 bulb T5NO fixture if not.





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post #6 of 11 (permalink) Old 04-06-2010, 12:51 AM
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I would check your CO2 levels using a drop checker and a 4 dkH (or a known dkH) reference solution, just to ensure you have adequate CO2. DIY CO2 is notorious for not being able to sustain a stable CO2 level, so that may also cause algae problems.

Also, as Laura mentioned, you will need to dose fertilizers in a tank that is as highly lit as yours.

Edit: Ninja'ed again!

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post #7 of 11 (permalink) Old 04-06-2010, 01:13 AM Thread Starter
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hmmm, I really don't want to invest in another light at the time. Is there anything else I could do? I hung it almost 15 inches from water surface and the photoperoid is only 7 hours. The drop checker is in the mail should of gotten here today, hopefully tomorrow. I have a ton of what looks like pearling but I think it's just co2 bubbles getting attached to my plants (can that be?).
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post #8 of 11 (permalink) Old 04-06-2010, 01:16 AM Thread Starter
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the co2 dropped my ph down to around 6.8 and I have a kh of 4.. I don't think it could handle much more co2.
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post #9 of 11 (permalink) Old 04-06-2010, 01:40 AM Thread Starter
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At this point I'd rather start adding the ferts instead of changing the light if there is no other way.
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post #10 of 11 (permalink) Old 04-06-2010, 02:30 AM
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If your pH is 6.8 and a kh of 4, you really have less than 20ppm CO2. Without adequate CO2, you will not win this war.


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post #11 of 11 (permalink) Old 04-06-2010, 05:42 AM
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Quote:
Originally Posted by IwantToScubaInMyTank View Post
the co2 dropped my ph down to around 6.8 and I have a kh of 4.. I don't think it could handle much more co2.
You cannot accurately estimate your CO2 levels based on the pH and the kH of the aquarium water. This is because the pH/kH/CO2 relationship relies on the premise that there are only carbonates in your water, which is not the case. This is why you must use a drop checker with a known dkH reference solution instead.

Quote:
Originally Posted by IwantToScubaInMyTank View Post
At this point I'd rather start adding the ferts instead of changing the light if there is no other way.
You should be dosing fertilizers in the meantime (both macro and micronutrients), while looking to replace your light.

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