PLEASE DO NOT POST UNTIL I SAY THE LAST STEP HAS BEEN REACHED! This will take me some time to type it all out an get all the pictures right. Thanks guys and enjoy! This is a step by step guide on how I built my nano Algae Scrubber for nano reef tanks. The Algae Scrubber is made out of black acrylic for my 44 gallon (with constant sump water volume) SPS reef tank. I designed this Scrubber to fit in my 20 gallon glass sump in an unuasable space above my baffles. My goal was to not spend that much money and be able to build something durable that had the following requirements: (1) Fit in my sump (2) effiencly help with removal of unwanted Algae and nutrients (3) Not spend more than $50 of my money(4) be as dark as possible with minimal light penetration to not have Algae growth in my sump (5) fit in my sump (6) be as silent as possible considering it is beside my bed. I have completed all these tasks with this build. Most Algae Scrubbers I see are expensive or way too big to fit in a tight space. Nothing against the DIY King (I love a lot of his stuff) but a light shining through the side of my sump just won't work for my needs. I chose acrylic because it's awesome, will last and with a little practice you can build a ton of stuff for your tanks. So here we go! But first: *****WARNING****** I am not an electrician, I am a diy guy. This thread contains the use of electricity, power tools and your brain. I will not be held liable for your equipment, damage to your tank, livestock death, personal injury or death or anything else described in this thread that could harm you or anything you have. You are doing this project AT YOUR OWN RISK!!!!****** Difficulty: Depends. If you are proficient with the use of power tools and have had experience with acrylic, moderate. If you have no experience with acrylic or power tools, Hard. Tools recommended: Dremel tool or 4" angle grinder (you can get both very cheap at Harbor Freight stores or .com), table saw with 80+ teeth saw blade (you could do this whole project with a $12 harbor freight dremel tool but your lines won't be clean and you will have more light leaking through), sharpie, PVC cutting tool (or table saw), pvc glue (optional), lighter or heat gun, wire stripper or needle nose pliers, tape measure, razor blade, super glue, drill bits with various sizes and optional soldering iron. You can make do without a lot of these items but you only as good as your tools. Supplies: -***Solid black acrylic sheet 1/8" thickness minimum. $12, for my project a 12"x24" sheet was needed: on eBay https://www.ebay.com/itm/282300342502 -Weld on #16 (this should be required (I previously had a small amount left over)), a 5th of a tube completed this project -LED lights $7 ***IP68 rating only! This means they can be submerged in water. I verified that the LED's I got were the rating listed on eBay. Red and Blue needed 10x red 10x blue. https://www.ebay.com/itm/191879998067 This item was shipped from china, took two weeks to arrive. -Various plumbing pvc $20, (5) 1/2" 90 degree, (1) 5', 1/2" pvc pipe, (1) 1/2" pvc coupler, (1) 1/2" pvc cap, (1) slip to female threaded npt 1/2" coupler, (1) 1/2" push connect to npt threaded adapter for murloc hose (depending on what piping you use you could need a male npt to barb adapter for 1/2" id nylon tubing) -Optional Power head or micro pump ( I had a micro sicce pump that I used. Any small power head will work but high flow power heads will need a valve to control the flow) . You could plump off your overflow line but considering I use a bean animal overflow design, I chose not to. Also a power head version is easier to remove. -Zip ties 6" length (I had some at home already) -IMPORTANT- MARINE grade heat shrink $4. I purchased a box of these from harbor freight. Make sure you get the box that contains multiple sizes. -12 volt power supply. I currently own a switachable 5A power supply powering 4 pc cooling fans, 12v solenoid and ATO relay on my tank. This power supply has no problem handling it all with the Scrubber. One can be purchased off eBay or amazon for around $8 (Chinese import). You can also purchase one on amazon. -LED wire only 10' worth or less. I had scraps from my light project. I purchased 25' of it from amazon. You only need 18ga 12v wire with a positive/negative side (black and red). -Aquarium safe silicon $4 from lowes or homedepot -Superglue gel type, prefer Loctite gel -Plastic Knitting mesh $3 at Walmart or your closest craft store or internet I will post the pictures along with the steps. I will also do my best to describe various safety concerns and why I did what.