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I have a JBL Crystal Profit external filter and wondered if I had to stick to JBL when buying replacement carbon etc. The internal media is rectangular but has a circular hole in the center you take out and replace with other media.



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Better off without carbon other then it being linked to HITH, it really only lasts a week at best.
All he's trying to accomplish is removing the Chlorine before the water goes into the tank...

I've never had a problem running carbon in any tank that I've had in the past 14 years. Though, I've never noticed a huge need for it either.:confused:

Granulated carbon has more surface area, but it may have a shorter lifespan...
 

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All he's trying to accomplish is removing the Chlorine before the water goes into the tank...

I've never had a problem running carbon in any tank that I've had in the past 14 years. Though, I've never noticed a huge need for it either.:confused:

Granulated carbon has more surface area, but it may have a shorter lifespan...
But if any dust from the carbon gets into the water it can lead to HITH in fish. Cheaper in my opinion, and safer is to just get a bottle of prime. 5ML treats 50 gallons, 250ML bottle $5- Carbon has a max lifespan of a week. As more, and more data comes out showing carbon, carbon dust, low quality carbon is used in aquaria causes fish health issues, i think the more it should be mentioned there runs a risk. If it's a fishless tank, same answer though i'm unaware of any plant risk using seachem prime.
 

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But if any dust from the carbon gets into the water it can lead to HITH in fish. Cheaper in my opinion, and safer is to just get a bottle of prime. 5ML treats 50 gallons, 250ML bottle $5- Carbon has a max lifespan of a week. As more, and more data comes out showing carbon, carbon dust, low quality carbon is used in aquaria causes fish health issues, i think the more it should be mentioned there runs a risk. If it's a fishless tank, same answer though i'm unaware of any plant risk using seachem prime.
I've never had any ill effects from using prime in planted tanks.
 
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