Seeing Vancmann’s design,
http://forums.loaches.com/viewtopic.php?t=18649
I right away had to use the pipes I had bought already, could not wait, thus I improvised a little, as you will see and connected the Garra rufe Q-tank to the others. (sorry, in a rush and no spellchecker available).
Vancmann wrote:...Would the fish be swimming through the syphon to get into the pipes?...
I assume so, as some need to enter a T-piece to get into the pipes . There is anyway an unclear pattern on loaches, who swims into pipes and who not. I have a few tanks connected and from a small tank with 16 Yunnanilus brevis, only 4 entered the main tank via pipes (over a period of months). And those are still there and won’t return ... Clowns in the lower picking order commuted frequently, but the beta is to large now and does not fit the pipe anymore (I assume, as I have not seen the beta in the pipe for ages). Tigers are basically sleeping in the pipes and commute looking for food. One (of 5) Y.caudipunctata, who was the smallest learned (after half a year) to visit, only one of the smaller tanks, while the tiger is visiting all. Since the small Y.c. goes to eat in the Yunnanilus tank, he grew to the size of the others. One bristlenose female, was the first to take adavantage of all connected tanks and has picked the smallest one as her home and plugs since the commuting pipe. This was the reason for me to add more pipes to that tiny nano tank (a tank that was setup temporarily, but now got a meaning as a traffic intersection so I leave it for a while). Garra flavatra go frequently through all pipes, but rare to the bristlenoses’s ones now, as the bristlenose plugs the pipe for them to return, so they need to wait until it comes out eventually to return to the main tank. And they keep them clean inside.
Vancmann wrote: Would fish in the syphon tube cause any overflow?
Yes they would, as I pump water from one tank to the other and use the pipes as the return. Therefore I have provided an additional pipe which is caped, so fish can not enter. The big clown would almost totally plug the pipe, but the entire network of pipes with all it’s cross-connection would allow the water to go different ways. Fish love pipes with current in.
I stuck to that double safety until last night, I used 2 uncaped pipes dia 40cm (1and ¼“ i/s dia).
One pipe is just a pvc pipe, as I use a bunch them already and will be used sooner or later by the fish. The other construction is a mix of pp wastepipes, only plugged together (no glue) I would not know which glue works, I tried hotmelt, which sticks on it, but more like a bodyfiller. I tried to weld some samples with the soldering iron, that worked (bad fumes though). PP wastepipes are very cheap, and would allow playing with temporary setups, or work great as return or safety pipes (without fish in them, as they can’t be seen).
The pics below show what I did last night in a quick playing session. The pipes highest point is 50cm (1,64‘) above water surface. I want to test how much air leaks through the stick-together connection due to the „vacuum“ (actually I’ll put some masking tape over it once it gets too much...).
There is an airbubble on the top that doubled over night, looks like the water does not flow, it may use the same diameter pipe which is shorter and does not go uphill, that pipe is clean of bubbles. I learned that small airbubbles get absorbed by the water once, it flows. Airbubbles partially coming from plants, in the upside down bucket (no flow) remain and need to be sucket off eventually.
to get the filled pipes into the water I sealed one end with what one Garra is right away claiming as „anappropriate decoration“
Garra rufa in the middle of the night: „excuse me, you out there, would you mind letting me sleep?! I am not going through that rubbish anyway“
