SuperNatural Pond Treatments FishShield, 1 Pound Acurel it goes through multiple densities

it goes through multiple densities of foam filters and is cleaned of solid debris

and is the key component in rapidly breaking down decaying matter at the bottom of your pond

while Walnut Finish and Natural Finish models use oak slats

Excellent low-temperature impact resistance

SuperNatural Pond Treatments FishShield, 1 Pound Acurel it goes through multiple densitiesFishShield Pond Fish Treatment helps improve pond conditions so that your fish remain happy and healthy! FishShield facilitates increase fish growth and food conversion. When used according to label directions, it is safe for use around fish and plants. Each ounce treats up to 500 gallons per week