Do I need Flourish Excel? - The Planted Tank Forum
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post #1 of 6 (permalink) Old 03-23-2018, 05:58 PM Thread Starter
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Do I need Flourish Excel?

I have a 30 gallon tank with fish and lots of plants, all doing well.
I fertilize using the Perpetual Preservation System.

Do I need to add CO2 via Excel if everything seems to be going well.
Are there other benefits to this other than keeping plants happy?
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post #2 of 6 (permalink) Old 03-23-2018, 06:02 PM
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Quote:
Originally Posted by doctordun View Post
I have a 30 gallon tank with fish and lots of plants, all doing well.
I fertilize using the Perpetual Preservation System.

Do I need to add CO2 via Excel if everything seems to be going well.
Are there other benefits to this other than keeping plants happy?
It's more of an algaecide rather than a CO2 source, but if your plants are doing well then there really is no need. Buy a small bottle and try it out maybe? Don't change anything other than dosing excel and see if there is an improvement.

"No Ice? Just Freeze Some Water"

My 30g (25g after learning how a tape measure works) Journal:
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post #3 of 6 (permalink) Old 03-23-2018, 06:21 PM
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In fact, gluteraldehyde (Excel) is known to cause issues with some plants, and some have noticed that discontinuing use after a long period dosing it has resulted in increased growth and vigor of their plants.

I only dose it after water changes. I always trim plants, then drain water by doing a substrate vac, wipe down the glass, then spot treat needing it, then fill back up and add a double dose of glut to inhibit all the spores that my maintenance routine just kicked up into the water column.
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post #4 of 6 (permalink) Old 03-26-2018, 04:58 PM
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I put in a pressurized CO2 system with a griggs reactor, so I stropped dosing Excel and all my plants went brown within a couple days. I'm now dosing excel and CO2 injection, and my plants have begun thriving again. It ultimately makes the plants more open to nutrient (mainly iron) absorption. I'm honestly curious about what others have to say on the topic, because I'm just on the verge of having my tank thrive with that lush green color.
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post #5 of 6 (permalink) Old 03-26-2018, 05:30 PM
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Originally Posted by Dr.Q View Post
I put in a pressurized CO2 system with a griggs reactor, so I stropped dosing Excel and all my plants went brown within a couple days. I'm now dosing excel and CO2 injection, and my plants have begun thriving again. It ultimately makes the plants more open to nutrient (mainly iron) absorption. I'm honestly curious about what others have to say on the topic, because I'm just on the verge of having my tank thrive with that lush green color.
Plants need 3 things: ferts, co2 and light. There's no reason your plants should go brown if providing all of that, unless your doing something fundamentally wrong. You shouldn't have to rely on excel to grow plants.
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post #6 of 6 (permalink) Old 03-26-2018, 07:46 PM
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Dosing glutaraldehyde 2% daily (not in fact excel, but you know, it's basically same thing) using the same concentration as recommended from Seachem stunted all my Rotalas and Ludwigias. Other plants seems ok, but R. rotundifolia, R. wallichii, R. nanjenshan. R. sp. Butterfly, R. macrandra, L. repens, L. sp. Guinea, L. inclinata var. Verticillata Cuba all severely stunted. The tank has plenty of macros and micros.

After atop dosing glutaraldehyde and some water changes to remove the remaining of the product, they started to grow healthy again.
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