Modified Penguin

Tachometer

AC Members
Mar 24, 2003
22
0
0
52
Walnut Creek, CA
Visit site
First time reader, first time poster, long time enthusiast here. I've had freshwater tanks off and on through my whole life (I'm 28 now) and have just completed the first several stages of setting up my dads old 30 gallon tank (he was using this same tank when he was in college!).

Anyway I'll probably be posting a lot about several things soon...but this one came to mind first and I was wondering what your opinions might be.

Without getting too detailed about how the tank is set up (the basics: 30 gal, live plants, community tank, running for about 3.5 weeks now, 6 black neons added yesterday...first fish, woot!)

I'm using a Penguin HOB filter (170 I believe, I'm going to pick up another filter today FYI). The inital problem I had was that the outflow from the Penguin was splashing so much that it was spraying water up on my lights and along the side of my hood...causing water to pool along a railing and drip down the front of the tank. I didn't want to modify the hood so I did, what I feel, is a pretty good fix.

I took two pieces of thick-ish mylar and attached them to the filter. On runs from the bottom of the outflow slot into the water, the other runs from the front edge of the lid to the water. In essence it creates a sort of "chute" that the outflow travels through to get into the tank (imagine two pieces of paper on top of each other, roughly 1 inch apart). I realize it is pretty dificult to describe so I hope my explanation makes sense. I do have some pictures that I'll post if there is any interest.

The benifit has been no more splashing, a drastic decrease in noise (just a very soft trickling sound), and much smoother water surface.

My concern is that the bio-wheel may not be getting enough air to function properly. The lid for the filter does have several air vents however.

Can anyone else think of any concerns?

My apologies for an epic long post!

Tachometer
 
Air shouldn't be an issue

Air shouldn't be an issue for the biowheel, but you have closed it in pretty well haven't you?

Did you try just raising the water level until the sound ws reduced? It will slow the wheel down too, when it drags in the water and so the splashing is reduced further. That's what I did, though I eventually removed the wheel as it helps to remove nitrates and CO2 which I need for my plants.
 
As I understand it, the wheel is not what drives out CO2, it's the excessive surface disturbance caused by the water splashing down from any HOB filter. And the Biowheel does not drive out nitrates, actually the bacteria colonies grown there PRODUCE nitrates by breaking down ammonia and nitrite.

I am glad to hear of your workaround and would be excited to see pictures. I have a similar problem; my Penguin 170 is VERY loud and I'm getting tired of hearing it splash. The only way to make it stop splashing is to fill the tank nearly to overflowing - so far the lid for the hood is immersed in water when closed! This is a royal PITA because it only takes a day or two for enough water to evaporate so it starts making lots of noise again.

I tried using one of these filters on a different tank and had to just return the stupid thing because it was splashing water on TOP of the cover glass and the fluorescent bulb!!!! :rolleyes:
 
First of all I apologize for the quality of the pictures. I shouldn't have used a flash. I'll try to take some better ones soon.

There are two pictures, one with the cover on, one with it off.

The first problem I had was with the outflow slide. It hangs a pretty good distance over the water and had a lip on the bottom edge forcing the water to sort of shoot out and splash a lot. I was getting water all over the place! I tried to fill the tank to the point where the bottom edge of the slide was in the water...but it just didn't hang low enough.

The first thing I did was use a Dremel tool to grind off that lip so there would be a straight line on the slide...straight down to the water. Then I cut a relatively thick piece of plastic and used aquarium grade silicon seal to attach it onto the slide. This gave the water...as it flows out of the filter...a straight path right into the water. You can kind of see that in the first picture.

However I still was getting more splashing than I was happy with. So I took another piece of thick plastic and silicon sealed it to the lid. The water flows out of the fliter, down between the two sheets, and right into the tank. That is kinda visible in the second picture.

It cut down on water surface agitation a lot, it no longer splashes, and is much quieter now. So far, so good!

In regards to the bio-wheel...it still spins freely inside the filter...it just isn't visible anymore. The "tunnel" I made with the pieces of plastic isn't fully enclosed...the sides of it are still open so the bio-wheel isn't totally shut off from air...which was one of my bigger concerns. I believe that since the outflow water is entering the tank more "calmly" I am not getting as much oxygenation as I was before...but since the tank is planted I am not terribly concerned about it.

So if any of you have a Penguin 170...or any other HOT filter...and are having splashing problems...I highly suggest this DIY fix. It was cheap, quick, and pretty easy to do.

Tachometer
 
^uh..what?
Like this. The water drops a shorter distance in the arrangement to the right.
filterangle.jpg
 
AquariaCentral.com