Fluval Bio-Foam 406/407 Filter Block 2pcs playstands Anti Ulcer is harmless to

Anti Ulcer is harmless to filter and all species of pond fish

saltwater & reptile environments

Ideal for small birds such as budgies

Looks dark grey after curing

increasing surface agitation & improving oxygenation that is essential for a healthy aquarium

Fluval Bio-Foam 406/407 Filter Block 2pcs playstands Anti Ulcer is harmless toFrom the Fluval range. Designed for use with external fluval 07 series filters: 406 407. Effectively traps majority of waste & debris. Complex foam structure maintains consistent water flow & naturally promotes beneficial bacteria growth. For freshwater & saltwater use. Simple & easy to use, place foam into canister filter. Bio foam for 406 407. 2 pieces per pack, replace every 6 months.