PL and Pecan: When they mentioned scrubbies, I looked at the floor cleaner ones, and Menards (I don't have a Home Depot close by) did not have but one of them, also in their rental section. Someone else said the scrubbies you use for cleaning dishes. They said they were cheap, but at Menards they were something like $5 for 10 of them. BUT, I looked one day, and that set of 10 was $1!!!! So, needless to say, I bought all that was on the shelf (23 packages) and then went back the next day and bought another 20 or so packages. I started out cutting them up and then said the heck with it and threw them in whole in a mesh bag. LOL I also had a mesh bag (I used one from potatoes that I had kept) and cut up a 100' roll of 1" clear tubing into 1-2" sections for my cheap "bio ball" type of media for the bacteria to attach to. Anything and everything will help. I thought I needed to take the stuff out and wash it and keep it clean and was told NOPE! The first year, just let the bacteria grow pretty much, or at least don't clean it all the time! I think I rinsed the stuff out just at the end of the year, but my pond didn't get going until June 1 last year. And, I must say, when I rinsed everything out at the end of the year (in December!), the scrubbies were dirty, but they were not full of mud like I really expected them to be. This second year may be different, so I will watch for that. I guess I DID backflush the DIY Skippy filter a few times during the year, but when not much dirty water came out, I figure it was good to go!
And, I might add, this is something I have learned with my aquariums in the house, too! Once they are balanced, good bacteria is present, no overfeeding, fish population is not overcrowded, I do very little in the way of rinsing my filters. I do "vacuum" the bottom about once every 2 months, replace with clean water, but other than that, they are pretty much carefree. I think I used to do too much in the past, and lost lots of fish because I was cleaning too much! At least, that's how it's working for me.