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astaxanthin
Half-Moon Plakat Koi Betta
Blue-Eyed Lemon Bristlenose Pleco
Though it is marketed as a planted substrate
Aquael's Pat Filter Mini is an internal filter rated for up to 30 gallons
Lava Rock (1L) Shrimp astaxanthinEheim's Lava Rock filter media is great because of it's light weight porous rock structure. The lava rock can be used as a replacement for cartridges in filters. It is much more economical and environmentally friendly to use than buying replacement cartridges. Just clean them off in a bowl of aquarium water and re add to your tank to continue breaking down ammonia in your filters.