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Search: Keyword(s): ; Posts Made By: AndreyT
Forum: Equipment Yesterday, 10:45 PM
Replies: 5
Views: 231
Posted By AndreyT
That's actually a physically illiterate thing to...

That's actually a physically illiterate thing to say. "The weight of the water" does not change regardless of where and how you run the hose.

The pressure the canister sees at its end will always...
Forum: Equipment 11-15-2014, 01:36 AM
Replies: 14
Views: 625
Posted By AndreyT
This last statement is so nonsensical, that it...

This last statement is so nonsensical, that it can be fairly safely concluded that the person who made it was either completely ignorant or highly influenced by some controlled substances.
Forum: Equipment 10-16-2014, 07:24 PM
Replies: 16
Views: 831
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 10-16-2014, 12:47 AM
Replies: 16
Views: 831
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, 07:18 PM
Replies: 11
Views: 593
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, 07:05 PM
Replies: 9
Views: 313
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, 07:33 AM
Replies: 9
Views: 313
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 08-09-2014, 12:34 AM
Replies: 26
Views: 698
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, 10:05 PM
Replies: 24
Views: 643
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, 06:26 PM
Replies: 16
Views: 517
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, 10:45 PM
Replies: 16
Views: 517
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, 09:53 PM
Replies: 13
Views: 648
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, 09:46 PM
Replies: 35
Views: 867
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, 10:38 PM
Replies: 11
Views: 444
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, 09:51 AM
Replies: 8
Views: 512
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 05-29-2014, 12:43 AM
Replies: 28
Views: 878
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, 09:31 PM
Replies: 16
Views: 601
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, 09:26 PM
Replies: 28
Views: 878
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, 06:58 PM
Replies: 38
Views: 1,595
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, 06:49 PM
Replies: 38
Views: 1,595
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 05-14-2014, 12:32 AM
Replies: 46
Views: 2,221
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, 11:14 PM
Replies: 1
Views: 281
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, 05:31 AM
Replies: 22
Views: 564
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, 01:09 AM
Replies: 22
Views: 1,057
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, 05:48 PM
Replies: 22
Views: 1,057
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...
Showing results 1 to 25 of 243

 
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