Some questions about wave current

[Nicolayo]

Hello.
I have some questions about wave current in my tank.
I have a 26 "x 26" x 26 "cube plus a 20 gallon sump.
I have 2 Tunze 6055 pumps, each in its own corner on the back wall, and 2 MP-10 pumps at the bottom of the tank. I have a mixed reef dominated by SPS corals. 750 gallon hour return pump EHEIM.
Various sources recommend the strength of the current for SPS corals from X25 to X50 on the size of the tank (I have about 50 gallons).
1. For the true values ​​of the movement of water in the tank, is it necessary to consider all sources?
2. All pumps operate in inverse mode (Tunze at 50% of capacity, ie 650 gallons per hour, MP-10 at 30%). Is it necessary to summarize their performance, given that they work in inversion?
3. I think there should be a difference between the tanks in the cube form and a parallelepiped form with the same volume, since in the latter, the pump needs more effort to accelerate the wave to the opposite wall than in the cube (it is shorter).
Because of the LPS of corals, I do not want to accelerate the pumps to large values, on the other hand, SPS corals require more.
How to find a middle ground?
Thank you in advance
Nick
P.S. sorry for google translator

 

[mcgyvr]

Don't over complicate the issue..
The range of water flow in reef tanks is very large.. There are many with full SPS tanks that run 75-100x.. So your range is really 20-100x.. That margin is massive and just proves that there is no "perfect" way or proper calculation that can be used..

Not to mention how tank size, rock placement, coral placement, etc... effect currents differently in each and every tank..

The best way to determine if its sufficient is to use your eyes and visually inspect YOUR tank..
Do you see areas of stagnation where food/detritus is collecting? If so you may want to change flow some to see if you can reduce that..
Are you getting algae growth on SPS corals? If so an increase in flow around the corals will help rid them of that..
Are you ripping the skin off soft tissue corals? If so you have too much flow.
Are your corals growing in weird unnatural patterns like they are being blown in the wind? That would indicate too much flow typically.
Stuff like that is what you want to be looking for..

Use your eyes and don't over complicate the matter by trying to use math to find the "holy grail" of flow rates.. There is no perfect number or calculation.

 

[Nicolayo]

Thanks for the quick response.
2 MP-10 are in the lower part of the tank specifically for detritus.
Rather, it settles on the stones, but I periodically blow the stones by hand with pump .
Because I keep nutrients and phosphates in the tank close to zero. I haven't had problems with algae for many years.
Skin from soft tissues does not tear.
I am really looking for the Holy Grail of the current, for my corals, trying to provide everyone with an appropriate current.
Part of the questions I asked was purely of cognitive interest, for I did not come across articles that could answer these questions.
I even wrote to Ecotech at one time, but they still did not answer the question.
I am not looking for mathematics in our hobby.
But everything has a landmark.
For example, before the era of LED fixtures, the calculation of the power of the lamps was calculated at 2 watts per liter, or even 4 for SPS corals, which gave a guide where to start.
Today, for LED fixtures we are talking about PAR. There are even recommendations on what types of corals how many PAR, etc.
Even in established tanks, it is sometimes necessary to measure the basic parameters of water.
There are certainly gurus who, at first glance, know that his corals are missing. I do not belong to such. I only switched to SPS corals for a year. And no matter how I would like not to do mathematics from my hobby, I also need some kind of reference points, so as not to harm at least.
thank
Nick