Micro bubbles and my ugly tank

[Saadatski]

yes herbie and bean both stop draining when the pumps are shut off...they stop draining when the water level hits the top of the siphon line...how much water drains down is dependent on how big your overflow box is and how low your siphon line is in the box...

your above statement makes me think you are using a HOB "U" tube style overflow box, which unfortunately cannot implement the bean or herbie drain systems...you need to have a drilled tank with an overflow box..

the rating on your overflow is a little misleading...though the 1" drain will likely be able to drain 750gph...it will certainly not do it quietly...unless you make it so the drain line is in full siphon...at which point it will empty the overflow box too quickly, and kinda trigger a power out situation where the box will have to refill and restart the siphon, at some point the siphon will fail to restart and you will end up with a flood...

and yes 150gph is ridiculously slow...but it is what it is...you cant cheat physics, anymore flow then that and the water is no longer laminar (traveling only along the walls of the pipes) and it will mix with the air in the pipe...this creates turbulence and noise and the end result is bubbles...all the cockamamie contraptions out there said to make air water drain pipes on our tanks silent are nothing but snake oil...there is only two ways to make it silent...dont allow the air to mix with the water (laminar flow), or dont allow any air at all (full siphon).

Sorry i wasnt clear on what i have. I have a 75g Marineland RR system drilled with a cornerflo overflow.

I wan more information on this Herbie style setup, and please give me a link to where i can read it. But do me a favor and not give me a very long thread with too much info that i cant read it all.

 

[Palting]

well there is your answer...turn your flow to your sump down...obviously way down...1" drain will flow laminar at about 150gph...any more then that and the air will mix with the water and you get bubbles and boiling...

it sucks to turn the flow down so much but there is the rub, durso drain systems suck too...the ONLY way to fix your drain is to implement a bean or herbie system OR to turn the flow WAY down..otherwise you have to live with the bubbles...

well i have a 1" drain, and yes, it does look like water is boiling in my sump. I do reduce the flow because of my poor sump, and if i lower the flow even more it will be ridiculously slow and will give me about 10 turnovers an hour...

Sorry i wasnt clear on what i have. I have a 75g Marineland RR system drilled with a cornerflo overflow.

I wan more information on this Herbie style setup, and please give me a link to where i can read it. But do me a favor and not give me a very long thread with too much info that i cant read it all.

A herbie or beanimal drain should both quiet and decrease micro-bubble production, but it can be a major DIY with your set-up and requires some reading to understand. OTOH, I've read through your whole thread, and I have to tell you there is probably something wrong with your sump set-up, and that your durso drains are just fine and are not the problem. I had a 110 with a single corner overflow running at 700 gph with NO microbubbles in the return I currently have a 150 gal with twin corner overflows with a return pump going at about 1100 gph and also NO bubbles in the return. Now, the water does bubble and boil when it first hits the drain area in the sump, but all the bubbles are gone by the time the water reaches the return area of the sump.

So, what that tells me is there is something wrong with your sump set-up, NOT your drains.

Now, show us a pic of how your sump is set-up, and what this "bubble diffuser" is that you placed. We can probably figure out what's wrong with your sump if you show a pic. Or, you can go ahead and start on a herbie/beanimal system.