Well good update! Good to see its not leaking again keeping my fingers xed. You don't have to buy anything super expensive when I was polishing that big tank I refinished I used micro fiber towels that the the local autoparts stores put on sale almost monthly during the summer. They are really soft. If I had one up and running though id get one of the lees sponges myself id be afraid id get it in the sand and ruin all my hard work (because that's what I do....lol). Plus I like to keep the sponge of that tank with that tank in a small container and they are usually smaller hand sized just easier to deal with. I use acrylic lees sponges on my glass tanks now.