Blue drums suck cause you can't see what's going on under the surface....... Also hard to lid. My first attempts left the lid in tact and just put a hole in the top to dump media in, but you can't work on it worth a crap. Can't move media, can't see whats going on inside aside from the "peep hole".
Another problem is the amount of room a pair of 2" drains take up in the barrels. Stick something that big in there and it messes with the boil. Don't get me wrong, it doesn't ever stop, but it could be better. The idea I had for a remedy would be to to stick bulkhead fittings in the bottom and run pvs up the side, vent at top then dump it in the wet dry. Problem is I don't know what a drain this style would be able to flow. May end up with 3 drains/barrell for it to keep up? Sadly I was about ready to add another pump to this system too. Was hoping to try to shove 5K gph through each barrell.
I'm with you on the humidity. I have my barrels sitting in the pond that is my sump. I have no choice put to cover the whole thing with a pond liner. This is my main reason for another rebuild. That and with the flowrates I'm trying to use I fear the barrells may end up being too small after all the drains and giant strainers needed for high flow rates.
I think the ideal setup for a square tank would be bottom drains UNDER the diffusers. You'd have to run lines back up the sides of the tank to dictate water level and vents so it doesn't siphon, which is another battle cause drains this style don't flow crap compared to standard drains. This drain location would keep media away from the strainers. Dump incoming water down the sides of the tank and you should knock the media down the sides of the tank and the diffusers would bring it back up in the center. If you use falling water to knock it down and air to bring it up it's not too tough getting a nice boil, but plumming interferes...... Drain plumming, even the air lines going down to the disks/diffusers screw with the boil. IF you could get all the plumming out, and no air lines, results should be phenominal......
Not sure what to think about bottom drains in these things either. IS it even worth the headache? If so is it worth it to try and concave a barrell? Pput a drain dead center in the bottom? Not as easy in a tank...... "V" the bottom? Drain on one end Korilia on the other? Should sluff that crap out in seconds, but more room taken up in the reactor by stuff that decreases overall volume. Do you just drop a big ol pump in them and suck out the bottom mum? Seems like it might be easier???
I've been thinking this stuff over for weeks and it seems like as soon as you get a good plan then you explore other options then all of a sudden the new idea trumps the old. Been ready to build for a while but can't make up my mind which direction to go.
Got to have a plan. Without a plan there can be no attack. Without an attack there can be no victory........ lol