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chriscobb
06/06/2017, 05:26 PM
In the process of a new build and would love to use the 6105's on the new tank. The new tank dimensions are 48"x36"x24". I would like to mount the Tunze externally in a box on the end of the tank. I understand I would need to route the acrylic wall of the tank to allow the nozzle of the powerhead to protrude through the tank. What I'm curious about is how big of an inlet or feed slot to route to keep the tunze properly supplied with water? I'm not interested in making waves, but merely want them mounted externally for a clean look.

Trying to find out the actual dimensions of a 6105? I'm also curious as how does the new built in controller interact with the apex?

rvitko
06/07/2017, 08:34 AM
I have no first hand experience with the Apex, the 7090 has a bypass option and can connect to the Apex, however, the control voltage changed in 2015 and this seems to have the effect that the speed settings are not accurate so the pump does not run at 30% and 40% equals 30% for example. For our own older controllers there is a calibration but I am not sure if it works with Apex. I believe BRS is working on a video now showing this and will try the calibration.

The 6105 includes two outlets, one is 63mm just shy of 2.5" and would likely be the most appropriate as it is wider and more diffuse. The other is 50mm, about 2". For inlets of the pump we generally like to have 4* the inlet area as outlet area, you really only need about double but this accounts for algae growth and clogs.

Do keep in mind that a problem with any install like this is it is permanent, if you change your mind, find the flow is not sufficient, etc, you cannot reposition the pumps. Personally I have found it is better to trade aesthetics for being practical, the ability to aim and position the pump as needed is one of the main features the Streams have over other pumps and it can be very limiting if rock work or coral placement does not work with what you set up. There is also always the risk that many years down the road a pump which fits will not be available or the outlet diameter could change on the next model. In my opinion it would be better to use the Stream rocks or work with rock work to hide the pumps and still keep them accessible for maintenance so you can change as needed down the road.

chriscobb
06/07/2017, 10:27 AM
Very helpful information Roger....I'm also curious about the stream 3 as well.

rvitko
06/07/2017, 11:07 AM
Here is how I would use the Stream 3, my apologies to whoever I lifted this image from, I just got it from Google images. This set up will create a gyre flow clockwise and then counterclockwise as you alternate the pumps.

To me these are very different pumps and the reason to choose one over the other depends on needs.

6150 is fairly large which is a disadvantage, probably the only one. It is very heavy and solidly made, it really is built to last almost forever only needing fairly inexpensive spare parts over the years which would be a big plus. It is also relatively noiseless 42db maximum and it could be quieter but we had no quieter surroundings to test in and what noise it does make is very low frequency so nearly inaudible. The flow is very broad and gentle and largely fills the tank, it also tends to round corners nicely. I have found that the high flow through the pump with the levitation and the backwards rotation makes them very low maintenance, in nearly 6 months I had no noticeable calcium build up, just some algae and bacteria slime and a bit of sand dust.

The 6105 is more versatile, smaller, easier to aim. It is a conventional DC motor with hall sensors and TF capacitors, giving it an expected life span of almost ten years, not more, the limiting factor is the capacitors, after approx 7-8 years they no longer reliably store a charge, hall sensors can also be complicated as a major overheat can shift them out of alignment with the rotor. The flow is far more directional, which neither good or bad, just a difference that may be better in some applications but not all. The noise is 52 db which is still relatively quiet, you will generally find just a room with the AC blower on high and hard flooring will have about this ambient noise from air coming in the registers and escaping under doors. They need cleaning every 3-6 months in a typical reef tank set up to remove calcium deposits. One main advantage is bigger magnet holders are available, the 6105 can with stronger magnets be used on up to 1" glass, for 6150, the strongest magnets available only work for up to 3/4".

chriscobb
06/07/2017, 11:22 AM
Thanks Roger....the weak magnets would definitely be a major drawback. The new tank is 1" acrylic.