tunze 6080

[tysonrussell]

i have a question for placement of a tunze 6080 that i was recommended to buy for my 180 gal tank now i wish i would have bought one that could be controlled but also my 180 is a tall tank it's 6ft x 30" x 18" or somewhere close to that also will i need to add another ph in the opposite side maybe a mj1200 i have a little giant return pump not sure the exact model i think a 4mdq ??? and no sea swirls at the time

 

[rvitko]

I would go with a position centered about 4-6" down on one side. If possible add a seaswirl to the other side and you should be all set. Otherwise get another 6080 and run them on timers at 1hr intervals with a 15minute overlap for a surge effect. I don't know that a MaxiJet would do much good with a Stream, it just doesn't have enough strength.

 

[tysonrussell]

ok thanks i was thinking about getting a seaswirl on the opposite side just waiting on some money

 

[senorjim]

I bought the 7400/2 with the controller that you recommended RVTIKO for my 36"w X24"d x 28"h aquarium. It seems to work good, but I notice that it shoots a burst of bubbles every once in awhile... Is this normal if the 7400/2 is completely under water? Also, I set the 7400/2 on the corner, so it will not be noticeable. Is that ok? Check out what I mean the @ is the 7400/2

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[rvitko]

The position is fine. As for the bubbles, there are a few possibilities. The pump is new and still has some air inside it. The KH is excessive or the light is intense and causing a dissolved gas saturation issue. The pump being a source of vacuum is causing the saturated gas levels to be relieved. The other possibility is that the intake is obstructed so a vacuum is forming that is high enough to degass even normal dissolved gas levels. Check your KH, if it is greater than 12 add some Calcium Chloride to drop it or just wait it out without adding buffers for a while. If you have an extremely high intensity light of say 400w or more, a shorter day will allow the oxygen produced by photosythesis to dissipate and reducing nitrate and phosphate will help prevent an overzealous photosynthesis by algae. If you wanted to read more about this phenomena it is covered extensively in Chapter 2 "Technical Water Preparation" Section 2.4 "Gas Transfer in the Aquarium" of the book Aquarium Ecology by Axel Tunze

 

[senorjim]

Thanks RVITKO for the information... I will test my KH and also where can I find this book or section to read?

"Chapter 2 "Technical Water Preparation" Section 2.4 "Gas Transfer in the Aquarium" of the book Aquarium Ecology by Axel Tunze"

 

[rvitko]

I think Marine Depot has it in stock, if you don't get the problem solved let me know and I'll try to type the most pertinent sections.

 

[senorjim]

Ok RVITKO, I did my testing (problem 7400 throwing bubbles) but I don't understand if my test readings are good or bad. I used Salifert test kits to get my results. As for the lighting, I have a 6 bulb T5 canopy (2-sun, 2-blue, 1-03, aquasun & all are 39W).

KH - 7.7 KH value in dKH (2.74 in Alkalinity in meg/L)
Copper - less .05ppm
NO2 Nitrite - 0-.1 (very close)
NO3 - Nitrate - .2 NO3 mg/L(=ppm)
PH - 7.7 (Very clear couldn't tell)
NH4 Ammonio - <0.5

There is nothing obstructing the 7400... Also, the booklet specified that the noise level will be reduced... It has been a little over a week and the noise is still there. Is that normal or is it supposed to be silent?

Please let me know, and thanks for your help.

 

[rvitko]

Why is the pH so low? Raise the KH a bit to at least 9dKH. The pump will always make a slight hum but it shouldn't be audible unless you are right up on the aquarium. It may however be worth disassembling the pump to check things out. The manual explains the procedure, it is possible one of the parts is a bit loose from shipping. The noise is reduced about 50-60% in the first 2 weeks and continues to decline until about 3 months when the parts should be at their perfect wear in point. Generally you can only hear the pumps after the full wear in when you are in a quiet room and about 6" from the tank.

 

[rvitko]

BTW- your lighting is quite intense and you might try a shorter duration particularly if you notice their are no bubbles in the morning and they increase at the end of the day.