Looking for a replacement for MGOCPM - The Planted Tank Forum
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post #1 of 9 (permalink) Old 02-17-2020, 05:29 PM Thread Starter
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Looking for a replacement for MGOCPM

Hey guys, Iím building a new dirted tank. In the past three years or so I havenít been able to find miracle gro organic choice potting mix. I used this mix on some of my most successful dirted tanks. Since not being able to find it I have used miracle gro natureís care organic and natural potting mix. However I feel that the new mix is not as effective at growing plants as the original mix I used to use. Does anyone feel the same way?

I seem to be unable to find the MGOCPM locally. I can buy it on amazon for the price of $20 for 8qts which I think is crazy! Any suggestions for other brands or different varieties? With spring coming I know Iíll have more of a variety in store but Iíd like to get it dirted before that.
Thanks!


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post #2 of 9 (permalink) Old 02-17-2020, 07:11 PM
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Originally Posted by xjasminex View Post
Hey guys, Iím building a new dirted tank. In the past three years or so I havenít been able to find miracle gro organic choice potting mix. I used this mix on some of my most successful dirted tanks. Since not being able to find it I have used miracle gro natureís care organic and natural potting mix. However I feel that the new mix is not as effective at growing plants as the original mix I used to use. Does anyone feel the same way?

I seem to be unable to find the MGOCPM locally. I can buy it on amazon for the price of $20 for 8qts which I think is crazy! Any suggestions for other brands or different varieties? With spring coming I know Iíll have more of a variety in store but Iíd like to get it dirted before that.
Thanks!


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The original miracle grow soil has been discontinued. This is why you can't find it anywhere. Any soil will work fine but you should pick one with the least nutrients possible. Take a look at the nutrients listed on the back and get one with the smallest numbers. The original miracle grow soil had very low numbers which is why Diana Walstad recommended it and probably why it was replaced since its worse for anyone growing terrestrial plants then pretty much anything else.


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post #3 of 9 (permalink) Old 02-17-2020, 08:10 PM
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Sifted organic topsoil should work as a substitute I think.
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post #4 of 9 (permalink) Old 02-17-2020, 09:01 PM
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Pretty sure it has just been rebranded, Perfomance Organics top soil looks like right stuff, no perlite like the container version has.

https://www.miraclegro.com/sites/g/f...110119_CFL.pdf
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post #5 of 9 (permalink) Old 02-17-2020, 10:33 PM
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Pretty sure it has just been rebranded, Perfomance Organics top soil looks like right stuff, no perlite like the container version has.

https://www.miraclegro.com/sites/g/f...110119_CFL.pdf
Different amount of nitrogen and potash etc.


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post #6 of 9 (permalink) Old 02-18-2020, 12:19 AM
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Different amount of nitrogen and potash etc.
.10-.05-.05 vs .13-.02-.02

In grand scheme of things .03% more nitrogen and .03% less potash and phosphorous is not going to make much of a difference. Why they changed the source materials they use is anybodies guess, probably so they could have more control of ratios.
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post #7 of 9 (permalink) Old 02-18-2020, 10:42 AM
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.10-.05-.05 vs .13-.02-.02

In grand scheme of things .03% more nitrogen and .03% less potash and phosphorous is not going to make much of a difference. Why they changed the source materials they use is anybodies guess, probably so they could have more control of ratios.
I agree, folks can use any soil they find, preferably ones that have as few "forest products" (leaves and twigs) as possible. Having done dirted tanks 3 times now, if forced to use new soil in a bag, I would probably prefer to dig up stuff out of my garden instead. More actual dirt that way. The best for me so far was using soil that was 3 years old in the bag and had all that time to decompose.


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post #8 of 9 (permalink) Old 02-19-2020, 01:50 AM
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Been having good results with earthworm castings. But I think that's hotter than the miracle grow stuff. Just my experience vs topsoil from menards

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post #9 of 9 (permalink) Old 02-19-2020, 06:01 PM Thread Starter
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Originally Posted by DaveKS View Post
Pretty sure it has just been rebranded, Perfomance Organics top soil looks like right stuff, no perlite like the container version has.



https://www.miraclegro.com/sites/g/f...110119_CFL.pdf


I grabbed a bag to open up and look at from Home Depot. If I donít want to use it for the tank I have a ton of houseplants Iím always fiddling with. Thanks for the suggestion!


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I agree, folks can use any soil they find, preferably ones that have as few "forest products" (leaves and twigs) as possible. Having done dirted tanks 3 times now, if forced to use new soil in a bag, I would probably prefer to dig up stuff out of my garden instead. More actual dirt that way. The best for me so far was using soil that was 3 years old in the bag and had all that time to decompose.


I actually have an opened bag of the MGOCPM from about three years or probably older that only has a few qts left. I planned on using it with this tank but donít have enough for the whole tank.


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Been having good results with earthworm castings. But I think that's hotter than the miracle grow stuff. Just my experience vs topsoil from menards

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I was also thinking of adding my own home grown worm castings as well. Might be worth creating my own soil mix from all the things I have.


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Last edited by Darkblade48; 02-25-2020 at 06:42 AM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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