The Air pump is the most important. I bought a nice one and I have plenty of air to spare. I had a bunch of smaller ones before. I had to constantly adjust the air level as the water level changed. Now just one and super quiet.Love your set up you need to do it and save some money
https://www.bulkreefsupply.com/al-1...D=9080&indexName=brs_prod_m2_default_products
