All TETRATEC INTERNAL FILTER SPARES TETRATEC INTERNAL FILTER SPARES Tetratec In1000 Impeller£11.48 Tetratec In300 Impeller£4.61 Tetratec In400 Impeller£6.11 Tetratec In600 Impeller£6.90 Tetratec In800 Impeller£9.19 Tetratec Suction Cups for IN300/400/600 plus£4.80 Tetratec Suction Cups for IN800/1000 plus£5.05