75 gal help

[pedalpower]

I'm setting up a 75 gal reef ready tank that is 48" (L) x 18" (W) x 21" (H). Right now there is a single output from the sump that is coming out of the left corner. I intend to have soft corals and a anemone. Would I be better off with the 7300s or 7400s on a multi-controller? How would you recommend I position them? Finally, would I still have sand storms using a substrate with a grain size of 2-4mm?

 

[rvitko]

If you use the two 7300/2 and have them aimed correctly you should have no sandstorms.

 

[pedalpower]

I was going to put them on the back wall and aim them to the opposite front corners. Would that be the best positioning?

 

[rvitko]

That should work, though lately I have come to like both pumps in the center back on either side of the brace aimed at there respective front corners. This seems to give a nice swirling pattern from top to bottom. It is largely a trial and error set up.

 

[pedalpower]

Thanks!

 

[pedalpower]

Will the 7300 speed be controlled by the 7094 unit ? Or is the speed manually adjusted on the powerhead? Do you have a package deal for 2 7300s and a 7094?

 

[rvitko]

There is no discount but there is a item code to simplify ordering- unfortunately it usually seems to complicate it unless you have the catalogue almost memorized which takes a few years. It is kit TF06. You could also just piece it together as your budget permits. You can control the speed on the 7300/2 by turning a potentiometer on the side of the driver with a small screwdriver. When it is connected to the multicontroller the driver must be at 100% power for proper function. Then you use the multicontroller to set speeds and pulse programs.

 

[pedalpower]

Ok, thanks!

 

[pedalpower]

Last question: What are the dimensions of the 7300 (l,w,h)?

 

[rvitko]

The dimensions are 3.9" around by 4.1" height. The intake strainer is about 6" long.

 

[pedalpower]

I appreciate your time today. But, I now have some questions about accessories.

Does the base of the powerhead pivot or do I need a deflector to aim the water flow to the corners?

Do you recommend a filter to extend the life of the unit or is the strainer sufficient?

If you do have a filter would the powerhead even require any maintenance?

Thanks!

 

[rvitko]

The powerhead base pivots and it does include a deflector you could aim it just about anywhere.

You can add a filter or a carbon pot or an extension, you can do a ot with the pump. There should be a full list of filters and accesories at www.tunze.com. The filter works almost as well as a diatom so it filters very fine and then it unravels and can be washed in the washing machine.

The maintanence would still be required, lime precipitates due to the slightly higher internal temp and vacuum within the pump and this is the main cause of cleaning and no filter will prevent this. The tolerances are extremely tight in a Tunze pump so a lot less calcium deposit is necesaary to stop the pump. If and wwhen this happens the pump stops and an alarm goes off. It should be disconnected and serviced immediately because the computer continuously tries to restart the pump.

 

[pedalpower]

Well, I really think that's going to be it. I think I really need to look at the pump and see it in action. Hopefully, someone will have it in stock

 

[rvitko]

7300/2 should be no problem, I shipped some out to dealers earlier in the week. I also have a few here. The multicontroller will be the bigger issue but I should be OK after next week on those.

 

[pedalpower]

Sounds great!

 

[pedalpower]

As it turns out, I've decided to move up to 105 gal. So, I decided on the 7400/2 with the multi-controller. I ordered from Marine Depot and it looks like everything was in stock because it's on it way.

Thanks for your help!

 

[rvitko]

If you need help or have questions about putting it in let me know.

 

[pedalpower]

Thanks! It turns out they were out of 7400s, so I may have some questions for you in a couple weeks.

 

[pedalpower]

I received one 7400 and the multi controller yesterday. I have a question about the powerhead: When I removed the impeller housing I noticed a lot of lubricant on the motorblock, is this normal?

 

[rvitko]

Yes, it is 1 part glycerin to 5 parts water and we use it for test running the pumps at the factory and to ensure that in storage the motor parts do not seize. It is completely harmless and breaksdown with no ill effect to the aquarium.