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Search: Keyword(s): ; Posts Made By: AndreyT
Forum: Equipment 10-16-2014, 06:24 PM
Replies: 15
Views: 679
Posted By AndreyT
One more time: in both cases in order for this...

One more time: in both cases in order for this aligning effect to work, the dead fish has to be braced against the flow. Just like the dart has to fixed inside the wind tunnel. In any case the body...
Forum: Equipment 10-15-2014, 11:47 PM
Replies: 15
Views: 679
Posted By AndreyT
When a body is passive, i.e. it simply floats in...

When a body is passive, i.e. it simply floats in the flow and does not attempt to move with relation to the surrounding flow, then the "hydrodynamic drag against the flow" simply does not exist. It...
Forum: Equipment 09-29-2014, 06:18 PM
Replies: 11
Views: 489
Posted By AndreyT
Er... You need to clarify your question. ...

Er... You need to clarify your question.

Fish breathe oxygen, so, obviously, the answer is "yes": having oxygen in the tank is important. Fish will die without oxygen. It is important at all...
Forum: Equipment 09-12-2014, 06:05 PM
Replies: 9
Views: 292
Posted By AndreyT
They woudn't. They will just provide more...

They woudn't. They will just provide more thorough filtration for the same flow.



The benefit is obvious: only one intake and only one return tube. Two filters in series will have about the...
Forum: Equipment 09-12-2014, 06:33 AM
Replies: 9
Views: 292
Posted By AndreyT
This has been asked several times before. ...

This has been asked several times before.

Connecting two identical filters in series is viable. It will improve filtration quality (less than 2 times though), while keeping the flow virtually...
Forum: Equipment 08-08-2014, 11:34 PM
Replies: 26
Views: 654
Posted By AndreyT
Judging bio-media by surface area alone makes...

Judging bio-media by surface area alone makes very little sense. It is not enough to have large surface area, it is also important to make sure that water flow can access all portions of that surface...
Forum: Equipment 08-06-2014, 09:05 PM
Replies: 24
Views: 561
Posted By AndreyT
AquaClear is very silent once you let it to...

AquaClear is very silent once you let it to break-in (apparently let it form some sort of lubricating slime of moving parts). It will be noisy for a first few days after the initial installation. It...
Forum: Equipment 08-06-2014, 05:26 PM
Replies: 16
Views: 494
Posted By AndreyT
It is not about distance. It is about height...

It is not about distance. It is about height difference. I.e. only the vertical portion of the distance matters, while horizontal portion - not much. With a sump the matter of height difference...
Forum: Equipment 08-05-2014, 09:45 PM
Replies: 16
Views: 494
Posted By AndreyT
There are not even remotely the same thing....

There are not even remotely the same thing. Canister filter and wet-dry filter (aka sump) work on completely different physical principles and have completely different properties.

Canister filter...
Forum: Equipment 08-01-2014, 08:53 PM
Replies: 13
Views: 614
Posted By AndreyT
So, how long is your "since I've had it"? 15...

So, how long is your "since I've had it"? 15 minutes? A day?
Forum: Equipment 06-16-2014, 08:46 PM
Replies: 35
Views: 818
Posted By AndreyT
I also use Airgas (in my case - in San Jose, CA)....

I also use Airgas (in my case - in San Jose, CA). I swap 5lb cylinders. For some unexplainable reason their prices swing wildly in either direction from swap to swap. I remember paying $35 per swap,...
Forum: General Planted Tank Discussion 06-13-2014, 09:38 PM
Replies: 11
Views: 362
Posted By AndreyT
The first option is, of course, cyanoacrilate...

The first option is, of course, cyanoacrilate glue (aka "superglue"). It is so perfect in such applications that there's no need to search for anything else.
Forum: Equipment 06-08-2014, 08:51 AM
Replies: 8
Views: 485
Posted By AndreyT
What exactly does "tightened down" mean in this...

What exactly does "tightened down" mean in this case? The purpose of the hose nut is to be backed up over the barb in the fitting after attaching the hose. In other words, the hose nut has to be...
Forum: Equipment 05-28-2014, 11:43 PM
Replies: 28
Views: 809
Posted By AndreyT
Well, if the working pressure produced by your...

Well, if the working pressure produced by your CO2 regulator is exactly what you need for your CO2 diffusion method, then you don't really need a needle valve.

The purpose of needle value is to...
Forum: Equipment 05-28-2014, 08:31 PM
Replies: 16
Views: 574
Posted By AndreyT
"We're told we shouldn't"? What is this exactly...

"We're told we shouldn't"? What is this exactly about? Where did you get this?

If you saw "Use no oil" printed on the face of an oxygen gauge, it refers to the gauge itself. It does not in any way...
Forum: Equipment 05-28-2014, 08:26 PM
Replies: 28
Views: 809
Posted By AndreyT
Others need them because they use...

Others need them because they use pressurized/liquid CO2 gas systems to fertilize their plants.

If you are using pressurized CO2 you need needle valve, bubble counter and solenoid valve (the last...
Forum: Equipment 05-20-2014, 05:58 PM
Replies: 38
Views: 1,548
Posted By AndreyT
You do your best trying to match the temps....

You do your best trying to match the temps. There's no need for extreme precision, just feeling the water by hand is precise enough for 50% or smaller water changes.



Just add the right amount...
Forum: Equipment 05-20-2014, 05:49 PM
Replies: 38
Views: 1,548
Posted By AndreyT
Not really. Most people who use Python have their...

Not really. Most people who use Python have their drain is lower than their tank. The proper use for Python in such cases implies that tap water is run only for a short period of time just to start...
Forum: Equipment 05-13-2014, 11:32 PM
Replies: 46
Views: 2,057
Posted By AndreyT
Yes. You don't have to do any modifications for...

Yes. You don't have to do any modifications for that. Just place the canister above the tank and run the tubes into the tank.



Physics-wise there's no difference where the canister is located....
Forum: Equipment 05-08-2014, 10:14 PM
Replies: 1
Views: 268
Posted By AndreyT
Well, this is a non-adjustable regulator. It will...

Well, this is a non-adjustable regulator. It will only work with GLA diffusers and other diffusers that accept the same fixed working pressure. If one day you decide to switch to a diffusion method...
Forum: Equipment 05-03-2014, 04:31 AM
Replies: 22
Views: 532
Posted By AndreyT
No, absolutely not. The pressure is...

No, absolutely not.

The pressure is analogous to the voltage in your electric outlets. It is 110V AC (in USA). If you want to plug one light bulb into it, it is 110V. If you want to split the...
Forum: Equipment 04-08-2014, 12:09 AM
Replies: 22
Views: 960
Posted By AndreyT
Note, as the Wiki article correctly states, the...

Note, as the Wiki article correctly states, the purpose of thread seal tape is to provide lubrication for the mating threads. The lubrication is needed in order to make sure that the threads don't...
Forum: Equipment 04-07-2014, 04:48 PM
Replies: 22
Views: 960
Posted By AndreyT
To use for what purpose, may I ask? So called...

To use for what purpose, may I ask? So called "teflon" tape is heavily misused in aquarium applications, which makes it hard to recommend anything without knowing what the original poster is planning...
Forum: Lighting 04-03-2014, 10:22 PM
Replies: 43
Views: 2,127
Posted By AndreyT
Even though someone might define a canonical...

Even though someone might define a canonical "white light" as a mix of all visible wavelength, it does not necessarily the case with any light source that produces light perceived by us as white....
Forum: Equipment 04-02-2014, 06:24 PM
Replies: 8
Views: 422
Posted By AndreyT
OK, if I understand it correctly, so the issue is...

OK, if I understand it correctly, so the issue is the "ceiling" of the internal compartment in Heartland Ensemble stand. Judging by the pictures, the stand indeed has very limited vertical space for...
Showing results 1 to 25 of 241

 
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