I wouldnt even use that for windows man. As for baffles I also wouldnt use anything smaller than 1/4. With the flow some of us have in the sumps, we can not afford something giving away. Free is usually good but not always.
You know that saying "pay peanuts, get monkeys".... I definitely dont want a monkey in my sump!
Ink PM me I want the plexi for fragsI use it for things i put on my BB then when it growa out on the plexi its easy to take out of the tank and frag off what I want i have my zoos on it now AND it works awesome
Nick