Plantex CSM + B - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 08-19-2005, 02:07 PM Thread Starter
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Plantex CSM + B

Gday,

I am thinking of buying 2 x lbs of Plantex CSM + B Extra Iron or 2 x litres of Flourish. I live in Sydney Australia and the total cost of the fert plus shipping is US$40.50 (AU$53).

The question is, is it worth paying US$40.50 for 2 lbs of fertilizer? I have read great things about it but I can also get 2 x litres of Seachem Flourish for US$65.

The Flourish should last me at least 2 years going by the instructions, ie. 5ml/250ml once or twice per week. I calculated at 20ml per week I would empty the container in 2 years.

How long should the Plantex CSM last?

Correct me if I am wrong.

Thanks.
Dave.
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post #2 of 9 (permalink) Old 08-19-2005, 03:46 PM
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2 lbs of Plantex will probably last you 5 years. I only bought a pound, and running 5 planted tanks for over a year now with plantex as my trace...I"ve barely made a dent in my little 1lb bucket.
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post #3 of 9 (permalink) Old 08-19-2005, 04:40 PM
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Agreed. I bought 1 lb 6 mos ago and I am still on my first batch of 2 tbsp.

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post #4 of 9 (permalink) Old 08-19-2005, 06:30 PM
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Two pounds of Plantex CSM will last a VERY long time. I'm running five tanks and have yet to make a large dent in the pound I got a couple of years ago.

If you mix two tablespoons in 500 ml of water the plantex will make 8 liters of mix. There is right about 2 cups of Plantex to the pound if I remember correctly. And there are 16 tablespoons in a cup.
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post #5 of 9 (permalink) Old 08-21-2005, 08:34 AM Thread Starter
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Rex,

Excuse my ignorance but can you explain how mixing 2 tab spoons of CSM into 500ml will make 8 litres of mix? Are you comparing this to the 2 litres of Fourish?

Also If I mix 2 tbl spoons of CSM into 500 mls of water how many mls per week do I need to add to my 400 litre tank.

Thanks again,
Dave.
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post #6 of 9 (permalink) Old 08-21-2005, 03:24 PM
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for a 400L tank, you should be dosing between 26 and 33 ml's CSM 3x per week. How heavily planted is it?

Normal dosage is to dose 5ml of 2T/500ml mix per 20g's (76L) 3x per week. Some people say to dose 25% more than that though. I guess it depends on the densitiy of plants.

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post #7 of 9 (permalink) Old 08-21-2005, 03:41 PM
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Dwayne: 2tbsp per 500ml of water will give you a solution roughly equivalent to the amount of micros in 500ml of flourish. You'd dose that solution into your tank the same way you'd dose the flourish.

So you can see that 1# of CSM+B will make a lot of solution.
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post #8 of 9 (permalink) Old 08-21-2005, 04:05 PM
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Quote:
Originally Posted by Dwayne
Rex,

Excuse my ignorance but can you explain how mixing 2 tab spoons of CSM into 500ml will make 8 litres of mix? Are you comparing this to the 2 litres of Fourish?

Also If I mix 2 tbl spoons of CSM into 500 mls of water how many mls per week do I need to add to my 400 litre tank.

Thanks again,
Dave.

16 tablespoons to the pound.

2 tablespoons in 500 ml of water.

You can make 8 bottles with one lb. That would be 4 liters of mix. 500 ml X 8 = 4000 ml or 4 liters.
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post #9 of 9 (permalink) Old 09-08-2005, 12:07 PM Thread Starter
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Thanks guys. I think that I will purchase 1 or 2 pounds of CSM.

Dave.
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