Amazon
Fluval Biological Enhancer for Aquariums, 4 Ounces
USD 6.04
Was USD 9.49
You save USD 3.45
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Tankstash deal score
Total: 55/100.
- Listed discount: 36.35% (25/70 points).
- Price-check record: (20/20 points).
- Selection context: provided (10/10 points).
This score uses the stored listed discount, price-check record, and Tankstash selection context.
It does not use market prices, price history, product quality, availability, clicks, or sales.
Why we picked this deal
The verified $6.04 price is below the $7.48 to $7.99 prices in the recent Amazon history.
Price checked
Tankstash may earn a commission from qualifying purchases made through Amazon links. This does not affect the price you pay.
Product description
One 4-ounce bottle of Fluval Biological Enhancer. Amazon sells and ships the new item for $6.04 with a one-time purchase.
Amazon also shows $5.74 with Subscribe & Save. Subscription terms apply. Free shipping requires Prime or a qualifying Amazon-shipped order over $35.
The comparison price is the Amazon List Price of $9.49. It is not a verified former selling price.
Camelcamelcamel history shows Amazon prices of $7.48 and $7.99 in the three-month chart. The current $6.04 merchant price is below those recorded prices. It is not an all-time low. The tracker does not yet show the current merchant price.
Price and stock were verified on September 17, 2026. Follow the product label for use instructions.