Did not in my 10 gal. The local water is hard alkaline with a high pH around 7.6.

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Natures Ocean Aqua Flora Core Black 16 Pounds / 7.2 Kg

Q: Is this sand, or small gravel? Sharp,Edges ?

It's definitely not sand. It's more like small gravel, and yes it has sharp edges. The grain size varies from about .5mm to 1.5mm

Q: Is this activ-flora black like the picture and discription indicates or a worldwide imports house brand?

Just as pictured, activ-flora black.....great stuff

Q: how many bags do I need for my 20 gallon long tank

One bag was barely enough for my 10 gal. heavily planted. If you want 2-3 inches of substrate depth, you might need more than two bags. Compare the footprint of your tank to that of mine which is about 20" x 10.5".

3.2/5

Product ID: 437138827

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Natures Ocean Aqua Flora Core Black 16 Pounds / 7.2 Kg

Have a Question? See What Others Asked

Is this sand, or small gravel? Sharp,Edges ?

Will this alter pH?

Is this activ-flora black like the picture and discription indicates or a worldwide imports house brand?

how many bags do I need for my 20 gallon long tank

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TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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