Cichlid Fish Forum banner
1 - 11 of 11 Posts

·
Registered
Joined
·
50 Posts
Discussion Starter · #1 · (Edited)
I have a new 75g tank with a couple penguin 350 HOB power filters. I'm getting a lot of micro bubbles in the aquarium. Eventually I'd like to do something about this once the tank is done cycling.

From the reading I've done so far it seems the bio-wheels are likely making this worse than it would be otherwise. I'm considering a couple options down the road:

1) Purchase the media baskets for the penguins. Add some sort of media to those baskets. Remove the bio-wheels.
2) Go with a fluval 307 or 407 filter. Remove the bio wheels from the penguin filters and possibly remove one of the penguin filters completely.

Option 2 has the added benefit of overall quieter operation with a slight risk of leaks from hoses and couplers.

Input? I know there is a process you can follow to completely convert the penguins into bio-filters without the wheels. I'm sure that may work OK. That option requires a bit more modification with check valves and air pumps. Plus I'm not sure if I'd end up with the same issue (bubbles) due to pushing air through the media in those baskets right before the outflow.
 

·
Registered
Joined
·
50 Posts
Discussion Starter · #6 ·
My tank is full of micro bubbles constantly. If I turn off the filters they of course disappear. But are the filters really the cause? I’m not 100% sure. They could be exposing some other issue. I’ve even heard that stress coat can encourage bubble formation too.

Not sure yet what my next step will be
 

·
Registered
Joined
·
50 Posts
Discussion Starter · #8 ·
Its pretty extreme though. If go look at youtube vids of planted tanks with a couple sponge filters they have almost zero bubbles in the column whereas mine is teeming with the stuff.

Fish waste and excess food produce ammonia to cycle the tank. It may be done cycling now but I am still watching levels.
 

·
Registered
Joined
·
50 Posts
Discussion Starter · #9 ·
Trying the cheaper option to resolve this first I got some media baskets for the penguin 350 and some bio media to fill them with. The plan is to get those in the flow and eventually start phasing out the bio-wheels completely.

If that doesn't resolve the massive cloud of micro bubbles then next step is the nuclear option. Going with a canister filter and keeping the output nozzle completely submerged.
 

·
Registered
Joined
·
50 Posts
Discussion Starter · #12 ·
Bio-wheels removed and the issue is is reduced by 75-80%.

They are back in now (new tank) and I have media baskets in the penguins filled with material to establish nitrifying bacteria in that location. After a couple weeks the plan is to start phasing out the bio-wheels one at a time until all four are out.

A lot of the media I got was way too big for the media baskets in the penguins so I held onto it. May eventually get a canister filter some day and if I do then I have plenty of media to cram in there.
 

·
Registered
Joined
·
50 Posts
Discussion Starter · #14 ·
I've basically proven the bio-wheels are causing this issue after removing them for about ten minutes. Water was much clearer. This is in-line with the things I've read on the internet about bio-wheels frequently causing or aggravating micro bubble issues in the water.

I have a plan now and am going to convert over to media that is in the media baskets instead of using bio-wheels. If I had to do this whole thing over I would've just gone with a single penguin 350 with bio-media in baskets and no wheels. And then had a canister filter as the second filter.

I'm still kinda tempted to add a small canister like a fluval 207 to the tank and completely remove the second penguin but I think it would probably just be a waste of money.
 
1 - 11 of 11 Posts
Top