i am going to start my first ever reef tank. if anyone has any extra live rock, or substrate, extra tanks or anything extra you don't want or need, i will take it FREE OF CHARGE...lol, btw i have no problem paying for shipping fees. just a poor 20 year old trying to have a new tank looking like all of you guys' tanks. btw, i want to get at least 2 false perc. clownfish and a beginner coral or two. i need a protein skimmer. what are you guys thoughts about DIY skimmers. whats a rough estimate it would cost for me to make one. i am on a very small budget, so i will be going very slowly with my new tank. btw it's a 20 gallon. any spare pieces,livestock,etc. would help me out a lot. thanks guys.