Excel after water change - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 06-20-2015, 03:34 AM Thread Starter
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Excel after water change

I do water changes on a weekly basis and dose Excel on a daily basis.

Question is, do you follow the directions on the label and increase the dosage on water change days?
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post #2 of 11 (permalink) Old 06-20-2015, 09:37 AM
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Excel is said to be morphed into other compounds after a couple of hrs mostly carbon.
But it's non existent after 48 hrs. So I don't bother with extra at water changes but I
do use it @ 2x the recommended amount. 2 ml per my 10g tank. Per day because of
degrading. I think it's useless just a couple of times a week.

The shortest distance between any two points is a straight line...in the opposite direction...
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post #3 of 11 (permalink) Old 06-20-2015, 10:24 AM
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Quote:
Originally Posted by ichy View Post
I do water changes on a weekly basis and dose Excel on a daily basis.
Question is, do you follow the directions on the label and increase the dosage on water change days?
I do the same as you.... and I don't increase the dose on water change days.
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post #4 of 11 (permalink) Old 06-20-2015, 12:50 PM Thread Starter
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Quote:
Originally Posted by Raymond S. View Post
Excel is said to be morphed into other compounds after a couple of hrs mostly carbon.
But it's non existent after 48 hrs. So I don't bother with extra at water changes but I
do use it @ 2x the recommended amount. 2 ml per my 10g tank. Per day because of
degrading. I think it's useless just a couple of times a week.
hmm doubling on a daily basis. I'm only doing 1ml per 10gallons... maybe I'll try 2ml in the morning and 1ml in the afternoon.

Are you using "real" excel or metricide?
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post #5 of 11 (permalink) Old 06-21-2015, 02:54 AM
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When the competitor to Excel first came out the manufacturer reported on comparative test results between their product and Excel, following the instructions on the bottles. The competitor's product worked much better and didn't kill off the vals in the tank. But, this result was exactly what should have been expected because the competitor did not recommend the huge dosage at water changes, and their daily dosage was higher, as I recall. After reading that I interpreted the test results as showing that Excel should be dosed every day at the same dosage every day with no increase for water change days. And, the dosage should be around 2 ml per 10 gallons. That is what I have been doing and it works much better that way. I believe this is now the accepted "correct" way to dose Excel.

Since many of us used Excel at 5 ml per 10 gallons on water change days, and it didn't do obvious damage, except to vals and a few other sensitive plants, it is obvious that using Excel at that dosage every day, as a way to help kill off algae, will not harm the fish or plants. It does make it very expensive to use Excel, but if it kills off the algae it might be worth the cost.

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post #6 of 11 (permalink) Old 06-21-2015, 03:16 AM Thread Starter
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Quote:
Originally Posted by Hoppy View Post
When the competitor to Excel first came out the manufacturer reported on comparative test results between their product and Excel, following the instructions on the bottles. The competitor's product worked much better and didn't kill off the vals in the tank. But, this result was exactly what should have been expected because the competitor did not recommend the huge dosage at water changes, and their daily dosage was higher, as I recall. After reading that I interpreted the test results as showing that Excel should be dosed every day at the same dosage every day with no increase for water change days. And, the dosage should be around 2 ml per 10 gallons. That is what I have been doing and it works much better that way. I believe this is now the accepted "correct" way to dose Excel.

Since many of us used Excel at 5 ml per 10 gallons on water change days, and it didn't do obvious damage, except to vals and a few other sensitive plants, it is obvious that using Excel at that dosage every day, as a way to help kill off algae, will not harm the fish or plants. It does make it very expensive to use Excel, but if it kills off the algae it might be worth the cost.
Great reply, thank you! So that leads to the next question. Cheaper to go with Metricide?
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post #7 of 11 (permalink) Old 06-21-2015, 03:49 PM
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Metricide is definitely much cheaper. I switched to it when the cost of Excel became more than I wanted to pay. As far as I can see it works just as well. And, even though it has a little higher concentration of the active ingredient in it I dose it the same as Excel.

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post #8 of 11 (permalink) Old 06-21-2015, 03:56 PM
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Question Hoppy,
What is the dosing range of metricide, in your opinion.
Minimum to have an effect and maximum to not harm fish/inverts.

Last edited by The Big Buddha; 06-21-2015 at 04:23 PM. Reason: Addition
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post #9 of 11 (permalink) Old 06-22-2015, 12:50 AM Thread Starter
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I read on here that metricide to excel was .6ml metricide=1ml excel.
Hoppy doses 1 to 1.
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post #10 of 11 (permalink) Old 06-22-2015, 01:21 AM
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I think the large water change dose could be useful if you're having algae troubles, or your tank is prone to algae. But for CO2 purposes it's pretty worthless.

Quote:
Originally Posted by ichy View Post
I read on here that metricide to excel was .6ml metricide=1ml excel.
Hoppy doses 1 to 1.
That ratio is correct. I also dose 1:1 @ 2ml per 10 gal


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post #11 of 11 (permalink) Old 06-22-2015, 03:18 AM
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Question Hoppy,
What is the dosing range of metricide, in your opinion.
Minimum to have an effect and maximum to not harm fish/inverts.
I don't know the answer to that. I found that 1 ml per 10 gallons for Excel was not enough to get what I considered healthy growth of most of the plants. 2 ml made a very noticeable improvement. Since Seachem recommends 5 ml per 10 gallons as a starter dosage, and water change dosage, it follows that 5 ml is not too much. But, I don't know what the effect of 10 ml per 10 gallons would be. For sure, 5 ml harms vals, but I found that most of them would eventually recover. With Metricide being a stronger mix, going above 5 ml per 10 gallons could well be a problem. So, why even try it?

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