Thrive VS Flourish - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 04-30-2018, 06:34 PM Thread Starter
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Thrive VS Flourish

I've been told that Thrive is better than Flourish Comprehensive. Is this true? I have a bottle of Flourish that's pretty old, about 7ish years old but I haven't used it up yet.

If I went with Thrive, what about Excel? Do I use it in addition to Thrive or does Thrive already have it included?

What about tabs?

I'm looking for personal experiences. Photos would be great! I'm just trying to find comparison pictures or stories between the two fertilizers.


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post #2 of 5 (permalink) Old 04-30-2018, 06:43 PM
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Thrive is a more complete fertilizer. Flourish is really only good for micros. Tabs work well under light - moderate column dosing.

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My 30g (25g after learning how a tape measure works) Journal:
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post #3 of 5 (permalink) Old 04-30-2018, 07:04 PM
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i jus use thrive and like the results save money on all other additves


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post #4 of 5 (permalink) Old 05-01-2018, 12:00 AM
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Thrive user here. They even make root tabs.

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post #5 of 5 (permalink) Old 05-01-2018, 05:21 AM
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I used Rotanabutterfly.com nutrition calculator to compare the two. I configured the calculator such that both fertilizers resulted in a iron concentration of 0.1 Parts Per Million. The calculator also list all concentrations in parts per million. The calculator came up with the following.

Element Flourish, Thrive
N 0.02188, 0.6383
P 0.00138, 0.17021
K 0.09594, 2.01351
Ca 0.04375, 0
Mg 0.03438, 0.13191
S 0.08666, 0
B 0.00281, 0.04894
Cl 0.35938, 0
Co 0.00013, 0
Cu 0.00003, 0.00191
Fe 0.1 , 0.1
Mn 0.00369 , 0.01277
Mo 0.00028 , 0.00038
Na 0.04063 , 0
Zn 0.00022 , 0.0034

If you look at the above list you will notice some zeros. That means the fertilizer doesn't contain that nutrient. You will also notice in Flourish that some elements are only present at part per billion levels. At that level fish food may have more of these elements than the fertilizer. So I will consider anything at less than 0.001ppm as zero. So Thrive has 5 zeros and Flourish has 4 zeros.Also Flourish has 2 elements (Na and Co) not in Thrive. Co and Na are animal nutrients not plant nutrients. So if we exclude these and reset all part per billion levels to zero We have the table below:

Element Flourish , Thrive
N 0.02188, 0.6383
K 0.09594 , 2.01351
Ca 0.04375, 0
Mg 0.03438 , 0.13191
P 0.00138, 0.17021
S 0.08666 , 0
Cl 0.35938 , 0
Fe 0.1 , 0.1
B 0.00281 , 0.04894
Mn 0.00369 , 0.01277
Zn 0 , 0.0034
Cu 0 , 0.00191
Mo 0 , 0
Ni 0 , 0

Thrive has much higher concentrations of the macro nutrients except for calcium and sulfur. For the micro nutrients Thrive is missing 2 but again has higher concentrations of what it does have. Neither fertilizer has nickel (Ni) which is also an essential plant nutrient.

As to the missing nutrient Tap water typically will have enough Ca, S, Cl, and Mo, Ni to meet the needs of the plants. Tap Water is sterilized with Chlorine (Cl) and Mo and Ni are only needed at 1part per billion and the amount in fish food and tap water is typically enough. So for most people the Ca, S, Cl, Mo, and Ni are not a concern because tap water will have them. Also copper pipes in homes will add a lot of Cu and Calcium is almost always present in tap water. In some cases there is too much calcium.

However the concentrations are very different. Thrive generally has higher concentrations. since it has higher concentrations you are more likely to have deficiency issues with Flourish. The low level of zinc in Flourish is however difficult to address. Tap water may have some zinc but I have never seen it listed in water quality reports.

However if you use RO or distilled water you should remineralize the water. Both Flourish and Thrive will not register on Gh (general hardness) test or KH tests. Fish and shrimp need more GH than flourish and Thrive provide provide. This is typically done by adding a GH booster. A Chloride GH booster ( made from Calcium and magnesium chloride) will cover Ca, Mg, and Cl. Other GH boosters are made from (Calcium and magnesium sulfate) Which will cover Ca, Mg, and S. My preference is to use a sulfate GH booster and and add about 3 PPM of regular table salt (NaCl). This would cover Ca, Mg, S, and Cl and add some sodium which animals do need. For Chloride booster people typically add Potassium sulfate to the Chloride GH booster.

Flourish is probably not a good choice when using RO due to the low levels of zinc and copper. And it is difficult to address this. Thrive on the other hand will work better since he deficiencies can be easily addressed With GH boosters and the addition of Table Salt or potassium sulfate.

Bump:

Bump:

Last edited by Surf; 05-01-2018 at 05:27 AM. Reason: Formating
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