stunreefer - thanks for the comments! if you have any questions, dont hesitate to ask, ill be glad to help
another on-going project......
did all of this a while back:
i am going to start growing my own green water and hatching brine for my tank - as well as setting up rotifer, brine, and mysid shrimp cultures in preparation for baby cuttles (whether my current eggs hatch or not - i will be breeding them in the future).
i decided to start with the green water and brine shrimp hatching. i am going to run a total of 7 green water cultures - 2 liters each and i will have four tubes for hatching brine so i can have a continuous supply of baby brine as well.
here is how i am building them.....
it is best to use a cylinder that has a conical bottom to prevent dead spots in the bottom. i also wanted to have a drain in the bottom for dispensing and air injection.
first, i took flat 5"x5" clear acrylic and heated it in the oven to soften it up.
here it is before
here it is if you leave it in the oven too long
here it is being bent into the conical shape. i used a short piece of acrylic tube underneath to control the depth of the cone and another piece on top to preserve the flat ring for attachment while pushing down the center with 1/2" PVC (this is the size PVC i will use for the drain.
here are all 11 cones
next, i fabricated the inside bezel out of a coupling and glued it to a short piece of 1/2" pipe. notice, i have also refined the outside circular shape, cut the hole for the drain pipe and flattened both gluing surfaces using a belt sander
here is the drain assembly glued together
here is the finished tube - the wall mount is attached at the water fill level for 2 liters.
i was trying to figure out how to make the tops of the phyto, rotifer and cilliate tubes so they would not allow contamination but would allow for the air to escape when my beer brewing wife had the genius idea of using fermentation air locks
here is my phyto farmer helper and one finished phyto chamber
all of em (and a beckett skimmer i built for someone else)