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CaribSea Arag-Alive Special Grade Reef Sand, 20-Pound
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From Carib Sea
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Report Info:
Last Updated: Jan 7, 2018
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Note: We only analyze "reviews" and ignore one-tap "ratings".
Top products in Aquarium Décor with authentic reviews:
Report Card
Pass Overall Grade
FAIL 
Rating Trend
Rating TrendFAIL Suspicious Reviewers
Suspicious ReviewersWARN Overlapping Review History
Overlapping Review HistoryPASS Unverified Purchases
Unverified PurchasesPASS Word Count Comparison
Word Count ComparisonPASS Phrase Repetition
Phrase RepetitionPASS Reviewer Participation
Reviewer ParticipationPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand RepeatsPASS Incentivized Reviews
Incentivized ReviewsPASS Deleted Reviews
Deleted Reviews
Most Trusted Reviews
Nice Sand [Go to full review]
Aug 30, 2017
100%
TRUST
TRUST
-
Verified Purchaser
-
Take-Back Reviewer (1 deleted Review; avg. rating: 5.0) -
Easy Grader (avg. rating: 4.8)
Least Trusted Reviews
Do not buy this unless you're a pretty in pink ... [Go to full review]
Jun 5, 2012 12 of 14 found this helpful.
20%
TRUST
TRUST
-
Verified Purchaser
-
Created on a high volume day
-
Take-Back Reviewer (29 deleted Reviews; avg. rating: 4.7)
-
Overlapping Review History: reviewed 1 of 9 top products -
Critical Reviewer (avg. rating: 4.2)
Analysis Details
Fail Rating Trend
Rating Trend
-
- 10%
- Created over 1 day
We counted 21 reviews for this product over the span of 1,912 days, an average of 0.0 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 1 or fewer reviews on any given day.
However, we see the following 1 day exceeding this threshold:In total, we found that 2 reviews were created on just 1 day. The reviews on these high volume days have rated this product an average of 1.0 while reviews from other days have rated this product an average of 4.6. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Fail Suspicious Reviewers
Suspicious Reviewers
Take-Back Reviewers
5 of the 21 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.
Warn Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
14% also reviewed:
Coralife Biocube, Size 29 by Coralife
14% also reviewed:
Instant Ocean Sea Salt for Marine Aquariums,... by Instant Ocean
14% also reviewed:
Tetra HT Submersible Aquarium Heater With... by Tetra
10% also reviewed:
The Joy of Cooking Comb-Bound Edition: Revised... by Irma S. Rombauer
10% also reviewed:
Champion Men's Long Mesh Short With Pockets by Champion
10% also reviewed:
Samsung 32GB up to 48MB/s EVO Class 10 Micro SDHC... by Samsung
10% also reviewed:
Maslow Standard Bowl, stainless steel by Maslow
Does not include products
from the same brand
from the same brand
12 of the 21 reviewers have substantial overlapping product review history. While this is more than we'd expect to see, the discrepancy in ratings between these reviewers and reviewers who have a more unique product review history isn't significant enough to rule out the possibility of it being due to random chance.
Pass Unverified Purchases
Unverified Purchases
6 of the 21 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.
Pass Word Count Comparison
Word Count Comparison
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- 0%
- Have an overrepresented word count
We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.
Read more about our Word Count Comparison test.
Pass Phrase Repetition
Phrase Repetition
-
- 0%
- Used substantial repetitive phrases
0 of the 21 total reviews for this product use substantial repetitive phrases between them. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Read more about our Phrase Repetition test.
Read more about our Phrase Repetition test.
Pass Reviewer Participation
Reviewer Participation
-
- 0%
- From reviewers with an overrepresented participation
We didn't find any participation groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Reviewer Participation test.
Read more about our Reviewer Participation test.
Pass Reviewer Ease
Reviewer Ease
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 4.4, while the average ease score for reviewers in this category is 4.3. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.4 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeats
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
Pass Incentivized Reviews
Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
-
- 0%
- Admitted to receiving an incentive
We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Pass Deleted Reviews
Deleted Reviews
- 0
- Reviews have been deleted
We have not discovered any deleted reviews for this product.
There are a few limitations to keep in mind regarding the Deleted Reviews test:
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
- We have no information on reviews that were never published in the first place.
- We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.