Fluval SPEC / EVO / FLEX foam block Size:2.1-oz This shifts the pK of

This shifts the pK of the buffering system further towards 7

PLEASE NOTE: As this product is natural pet medicine

20% min Phosphorus 1% min Potassium 0

For severe cases

Fluval SPEC / EVO / FLEX foam block Size:2.1-oz This shifts the pK ofThe block of filter foam for Spec, Evo and Flex aquariums provides effective mechanical filtration by trapping large particles and debris. The filter foam block is suitable for the following aquariums: Evo 19 L (5 US gal) (10528) Evo 52 L (13. 5 US gal) (10531) Spec 10 L (2. 6 US gal) (10515 and 10517) 19 L (5 US gal) spec (10516 and 10518) 34 L (9 US gal ) flex (15004) Characteristics Specially designed for Spec, Evo and Flex Fluval table aquariums;