F31

Precision Marine Pre-Filter Sponges are custom made to our specifications. Ten sizes to choose from. Safe for use in any aquarium.

Practical uses include:

• Media Reactors
• Calcium Reactors
• Effluent Chambers
• Pond Prefilters
• 3.25″ OD 
• 3/4″ ID
• 3/4″ Thick