This substrate is ideal for maintaining a high PH. It is specifically blended for optimum chemical and biological balance. Also, helps to reduce nitrites, nitrates and ammonia spikes. The coral color is natural and it may require some rinsing to remove dust particles. I plan to buy more bags of coral for a 40 gallon aquarium. I recommend this product for aquariums requiring a high PH.

+3points

3of 3voted this as helpful.

Review 2 for Aquarium Gravel Substrate from CaribSea

Overall rating

5 / 5 7 reviews

Lots of rinsing, otherwise great

December 21, 2012

by WigglePuppy

fromCanada

What is your gender?F

How many pets do you have?5 or more

How often do you shop at PetSmart?Monthly

Be prepared to rinse a lot. I knew this before purchasing. I added a bag to an already established 55 gallon saltwater (fish and liverock/live sand) and was very happy with it. It has mixed well with the other crushed coral in the tank nicely. Because of my diligent rinsing the water was only mildly cloudy, and completely clear the next morning. A tip for new hobbyists: by rinsing one pound of gravel at a time, you'll save yourself time and backache. It will go faster than trying to rinse an entire bag all at once.

+4points

4of 4voted this as helpful.

Review 3 for Aquarium Gravel Substrate from CaribSea

Overall rating

2 / 5 7 reviews

so so

September 25, 2012

by AZballer

fromPhoenix, AZ

What is your gender?M

How many pets do you have?3

How often do you shop at PetSmart?A few times a year

The gravel itself is good, but make sure you pay your water bill. Pre-washed is a lie. I had to take it back out of my tank because the sediment was so bad. It also has a lot of debris floating to the top that needed to be strained. I'll pay more for the better stuff next time some where else.

+1point

3of 5voted this as helpful.

Review 4 for Aquarium Gravel Substrate from CaribSea

Overall rating

4 / 5 7 reviews

Looks Great

July 12, 2012

by Reefaquarium

fromMichigan

What is your gender?M

How many pets do you have?5 or more

How often do you shop at PetSmart?Monthly

This stuff is great for a refugium it has enough surface area for micro algaes and bacteria to grow and catches any large debris that you have floating in the tank. Personally I would not use this directly in a reef aquarium because it is so course but would work great in a FOWLR. I did read on a previous review that it clouds the water and while I did have some minor clouding for about and hour it clears very rapidly...just be sure that you clean this first or if you can run it in a curing tank first this works even better, also putting this in the tank slowly after the water has been added will help prevent any clouding.

+3points

3of 3voted this as helpful.

Review 5 for Aquarium Gravel Substrate from CaribSea

Overall rating

5 / 5 7 reviews

perfect pH buffer

January 19, 2011

by number20121

fromRock Hill, SC

What is your gender?F

How many pets do you have?5 or more

How often do you shop at PetSmart?Monthly

I use this in my tropical tank to keep the pH stable at neutral 7.5 for the two apple snails living in there.

Pros: looks nice, keeps ph stable

+4points

4of 4voted this as helpful.

Review 6 for Aquarium Gravel Substrate from CaribSea

Overall rating

5 / 5 7 reviews

works well, but is cloudy

October 28, 2007

by rfdarkblue

fromHouston , Texas

What is your gender?M

How many pets do you have?4

How often do you shop at PetSmart?Weekly

Appearance

4 / 5 7 reviews

Quality

5 / 5 7 reviews

this substrate works REALLY well for fish that like a higher pH. The only drawback is that it WILL make your water really cloudy for at least 2 days.

+8points

9of 10voted this as helpful.

Ratings-only reviews for Aquarium Gravel Substrate from CaribSea

Based on 1 ratings-only review

Overall rating

4 / 5 7 reviews

1 out of 1 recommend this product