Seachem Flourish Comp. Change - The Planted Tank Forum
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post #1 of 16 (permalink) Old 08-25-2014, 10:49 PM Thread Starter
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Seachem Flourish Comp. Change

Something in the ingedients for Seachem Flourish Comprehensive plant food has changed. The previous bottles and the last 500 ml. bottle I was using had a liquid that was a very dark color. I could put some into my tank and see how the water flow was distributed by following the dilution of the product.
The new bottle I purchased has a very weak tea look to it. Unfortunately I discarded the old bottle and am unable to compare the current ingredients versus what's in the newer (new label too) bottles. I actually thought there was something wrong and went out and bought another bottle--same thing.
It seems to me Seachem cut down the amount of micro elements so they could keep the price similiar to what it was.

I was just wondering if anyone who uses this noticed the color difference too?

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post #2 of 16 (permalink) Old 08-25-2014, 11:15 PM
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That's common for the product. I've found when I first buy them it's a very light color that darkens considerably as it ages.

Check out the second question in the link below.
http://www.seachem.com/support/FAQs/Flourish.html
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post #3 of 16 (permalink) Old 08-26-2014, 12:13 AM Thread Starter
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Thanks for the link Jeff5614. Thought for sure there was a change but I guess not.

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post #4 of 16 (permalink) Old 08-26-2014, 01:09 AM
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Quote:
Originally Posted by Jeff5614 View Post
I've found when I first buy them it's a very light color that darkens considerably as it ages.
I wonder why it darkens over time. Oxidation? Seems any color change would indicate something but I'm not sure what. It would seem the availability of nutrients could become compromised in some way if the discoloration is a reaction of some sort.

I've left Plantex solution out in the sun in a clear container (just forgot not an experiment). It just gets more "copper" colored at first then lightens not darkens. Just curious if any chemist can explain.
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post #5 of 16 (permalink) Old 08-26-2014, 01:32 AM
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I wonder why it darkens over time. Oxidation? Seems any color change would indicate something but I'm not sure what. It would seem the availability of nutrients could become compromised in some way if the discoloration is a reaction of some sort.

I've left Plantex solution out in the sun in a clear container (just forgot not an experiment). It just gets more "copper" colored at first then lightens not darkens. Just curious if any chemist can explain.
I would imagine it darkening is due to oxidation. Availability of nutrients might be compromised, but one cannot really be sure unless it is measured.

For your second experiment, it might be due to UV exposure. I recall looking over (quickly) some papers on Pubmed when someone asked about UV damage to chelators in the past.

Anthony


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post #6 of 16 (permalink) Old 08-26-2014, 01:42 AM
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It wasn't an experiment just forgot to bring the solution inside. After 2-3 days I didn't trust the mix anymore since I've heard the same thing about chelators being photosensitive. I simply left it out to see what would happen (besides it was trash IMO anyway). Nothing dramatic, just lightened over time.

I may post a question on Seachem's website and ask why the solution darkens over time. My gut just tells me the guaranteed analysis could change depending on what is going on. They seem to be pretty honest about most things so I have no reason to doubt any responses they may give. From my experience Seachem is pretty honest when it comes to questions on their forum. My guess is oxidation however, short answer... I have no idea lol
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post #7 of 16 (permalink) Old 08-26-2014, 03:58 AM
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This just happened to me also. With not only comprehensive but Seachem Iron also.

The new iron liquid is very light, as my old bottle was dark crimson.


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post #8 of 16 (permalink) Old 08-26-2014, 06:04 AM
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As much as bottles get opened could it be evapration of the water used to make it, leaving behind a more condensed liquid?
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post #9 of 16 (permalink) Old 08-26-2014, 06:19 AM
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speaking of Seachem products, is the concentration of their Nitrogen and Phosphorus ferts same as before? Because I prepare my KNO3 and KH2PO4 solution to be same strength as Seachem based on the post by Left C back in 2007.

http://www.aquaticplantcentral.com/f...tml#post336492
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post #10 of 16 (permalink) Old 08-26-2014, 09:28 PM
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I've wondered if the solution is more dilute at first because it's harder to mix it by shaking a full bottle. Then over time, unless thoroughly shaken each time before it is used, the solution would continue to settle and become denser.
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post #11 of 16 (permalink) Old 08-26-2014, 10:16 PM
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The bottle states to refrigerate if opened for more than a month so perhaps there is some degradation going on.
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post #12 of 16 (permalink) Old 08-26-2014, 11:19 PM Thread Starter
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The bottle I have states:
"Refrigeration is recommended 3 months after opening".
I guess I'll start keeping a small amount on hand and strat refrigerating the rest.

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75 Gallon--Rainbow Fish Tank/Amano Shrimp
29 Gallon--Celestial Pearl Danios/Yellow Shrimp
20 Gallon--Ember Tetras/Orange Shrimp
10 Gallon--Chili Rasboras/Cherry Red Shrimp
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post #13 of 16 (permalink) Old 08-27-2014, 12:32 AM
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Quote:
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The bottle states to refrigerate if opened for more than a month so perhaps there is some degradation going on.
Quote:
Originally Posted by trapperwolves View Post
The bottle I have states:
"Refrigeration is recommended 3 months after opening".
I guess I'll start keeping a small amount on hand and strat refrigerating the rest.
Mine said 3 months.
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post #14 of 16 (permalink) Old 08-27-2014, 04:01 AM
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I've always refrigerated it. I've talked to seachem and they say its normal for it to darken.
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post #15 of 16 (permalink) Old 08-27-2014, 04:23 AM
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I have noticed the seachem iron darkens also.


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