Source google image: https://www.aquariumlowcost.com/582-home_default/plaid-board-multifunction-frag-rack-isolation-30-cm-x-15-cm.jpg
Isolation 30 cm
Source google image: https://www.aquariumlowcost.com/582-home_default/plaid-board-multifunction-frag-rack-isolation-30-cm-x-15-cm.jpg