Under gravel filters perform best when water flow through the gravel bed is consistent and predictable, creating surface agitation for tank oxygenation. Air pumps and airstones can deteriorate or clog. As a result, they become noisy and ineffective...frequently requiring replacement and/or service.

Marineland Reverse Flow Powerhead - Replacement Sponge Prefilter deliver constant flow with fully adjustable aeration and increased surface agitation...and they remain silent at all times. The custom air valve regulates air flow, the air filter eliminates noise and dust, and the intake strainer keeps debris from fouling the impeller...that''s efficiency.

The Marineland Pengiun 550 Powerhead has a capacity of 170gph. The Replacement Sponge Prefilter is 6 inches long and 2 1/2" in diameter.

SUB-TOTAL	SAVER (5-8 Business Days)	GROUND (2-5 Business Days)	EXPEDITED (2-3 Business Days)	OVERNIGHT (1 Business Day)	HAWAII & ALASKA (2-5 Business Days)
$0.01 - $25.00	$6.99	$8.99	$16.99	$34.99	$16.99
$25.01 - $50.00	$7.99	$10.99	$19.99	$39.99	$19.99
$50.01 - $75.00	$8.99	$12.99	$24.99	$49.99	$24.99
$75.01 - $100.00	$9.99	$14.99	$29.99	$59.99	$29.99
$100.01 and above	10%	15%	30%	40%	30%

Customer satisfaction is very important to us, please read the following guidelines before submitting a return. If you need to cancel your order before it ships please call us at 1-888-373-8686 and reference your order number. Please have your order number ready when calling.

• Damaged / Defective Item/s - Please call us at 1-888-373-8686 within 21 days if the item/s are damaged in transit. Please hold onto the item/s, original shipping box and packing materials. For defective items, please contact us within 60 days. For defective items after 60 days please contact the manufacturer directly to submit a warranty claim. Please do not refuse the package or attempt to return it yourself prior to contacting us. We will remedy the situation for you! Please have your order number ready when calling.
  
  
• Changed your Mind - You have 60 days to submit a return below. Items must be in their original condition including manufacturer packaging, manuals & components to warrant a refund minus the original shipping & handling charges. It is your responsibility to ship the item back to us. If you refuse the package all incurred shipping charges will be deducted from your refund. Refunds are issued within 1-5 business days after we receive your return.
  
  
• Product Exchanges - We do not do exchanges, simply submit a return below within 60 days and place a new order online. Items must be in their original condition including manufacturer packaging, manuals & components to warrant a refund minus the original shipping & handling charges. It is your responsibility to ship the item back to us. If you refuse the package all incurred shipping charges will be deducted from your refund. Refunds are issued within 1-5 business days after we receive your return.

Click here to submit a return.