
I used to use them in Rena XP4 and then switched to Fluval FX4 and started losing media and packages. Tried several other brands, results weren't very good. I returned to them and the tank quickly went back to normal. My only complaint is that you buy a bag and throw it away. I would like the transport box to be sold loose in large containers to keep costs down and give consumers choice.

Aquael Fan Filter Mikro Plus
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KEDSUM Battery Aquarium Air Pump: Ultra-Quiet Rechargeable Fish Aerator with Dual Outlets - Ideal for Fish Tanks, Outdoor Fishing, Fish Transportation, and Power Outages
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Greenpro Micranthemum Monte Carlo: Live Large Pearl Grass Aquatic Plant In Tissue Culture Cup For Freshwater Fish Tanks And Aquariums
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