I change a lot of water. I hate changing water.
I'm not sure how many tanks you're looking at but if it's over 10 I'd look into automation.
I've been thinking how I can automate changes in 100+ tanks.
Since I am currently revamping the fish house it's time to plan ahead. Glad to see you're doing that.
Oh, I plan on having something in the hundreds. I need enough tanks for the fish/shrimps (probably multiple groups of each, with the ability to separate by sex), fry, QT, and so on and so forth.
haha, yeah I made the mistake of not planning the space from the beginning when I was doing mostly reptiles; I hate having a mish-mash of tank sizes.. Definitely not making that mistake again.
As an aside, as much as I am going to automate my drain fill once a week I would still do a manual drain/siphon on the tanks to actually remove detritus and mulm.
I plan on having a loose line just incase I need to do this (more on this below).
Why do you have matten filters in there? You could have an autodrip system and that would change a certain amount of water over a period of time. If you're going to drill your tanks you could put an automatic overflow there (move the green piping up so that a failure of that seal doesn't drain your entire tank). Also you probably shouldn't add the yellow tubing there, if you need to drain an entire tank then do it manually. The more point of failures in your system the higher chance of catastrophic failure. Green piping needs to be on a grade and it's generally a good idea to have the waste drain into a pre-drain catch just in case.
More on the drip system below, but the mattenfilters are there for 2 reasons;
1. a sort of "pre-filter" for the overflow/drain. If I have a bunch of tiny fry, I don't want them going down the drain. Probably not needed, but I like redundancy.
2. If I did a drip, I don't think that'd be enough to dilute the tanks enough if I have large numbers of fry in the tanks. Especially since I don't plan on a continuous drip (again, more on that below). The mattenfilters will be a biological back up just incase.
I realized the same thing about the overflow after posting the pictures; those will definitely be moved up. the drain will be on a grade when I build it, the models were just done level for reference.
What do you mean by having the waste drain into a pre-drain catch? Do you mean have it drain into a "waste bin" of sorts before disposing of the water? if so, I plan on doing this. I bleach (then dechlorinate) all waste water from the animals.
Copying this from another forum, so some of this may have already be mentioned....
So after going back and forth, I decided I'm going to attach 2gph (maybe 4gph) drippers to the red line (see first post) instead of just using valves above each tank. I'll probably put it on a timer to run for an hour everyday (plus 5-10 minutes to fill pipes and build up pressure for the drippers) . Assuming I go with 2gph for an hour, this will change the following amounts each week;
Double this If I go with 4gph.
Now I'm not going with a continuous drip for a couple reasons; first is I'm still going to be on city water, so I have to pay for every drop. A continuous drip may not add a lot of cost per tank, but it adds up quickly with the number of tanks I plan on having. Secondly, I need to give the R/O system time to refill the barrels (more on that when i figure out the details). Lastly, I really don't think more is necessary, with the exception of the low boys. The 10 gallons will be for fry, so changing 140% a week is a nice amount, and more than I currently do.
I'll also have a seperate loose line attached to the water storage that I can use if I need to do larger or more frequent water changes.
I was originally planning on using ball valves above each tank, but I think there's too much room for error, and it's going to be far too much fiddling to dial in flow rates.