Co2 recommendations - High light 125G

Hi Sam.

It will be easier to manage if you go to 2 bulbs instead of 3....I wish you had a PAR meter to see what I mean..

A needle wheel setup may work well here for your size tank. Let the filters do their thing and have the c02 separate...

Please note that the controller will react to ANY changes in PH, and not all these changes are carbon based....so the controller can cycle on/off with no need resulting in flunctuating c02 levels...some folks have gotten away from controllers for this reason. I myself no longer use one...

This is a bad thing generally and the plants will eventually suffer from it..

 

Hi Sam.

I can dig up the post, but basically, you take a normal powerhead and cut the impeller blades. When c02 bubbles enter the powerhead, the impeller does an excellent job of chopping up the co2 and creating mist. Mist is just what it sounds like. Is c02 finely chopped so almost no bubbles remain.

The powerhead also supplies some extra flow and the ability to direct the flow somewhat.

Is an easy and effective way to introduce c02 to the tank and provide extra current to blow it around the tank at the same time.

Some models already have a needle wheel impeller, but most brands you can snip with cutting pliers easily.

 

Here is the original thread by Tom.

http://www.barrreport.com/showthread.php/5809-Needle-wheel-DIY-modifications?highlight=needle+wheel

I made it a sticky in the c02 forum so is easy to find....

 

I'm using 2 AM1000 reactors each driven by a 450 GPH pump on my 180. My starting point in the morning is 7,1 and I can bring it to 6,5 in 45 minutes. No reactor lag, no deficiencies and no algae. I'm using 250 Watts of T5, no reflectors.

Seems like your CO2 has a lot of lag, needing hours to do the same.

regards,
dutchy

 

And to add ( i have a similar tank size ) 2200l/hour is not much flow. I currently have 2 Hydor Nano's (1600l/hour each) an Eheim 2080 (1700l/hour) and an Eheim 2250 (1000l/hour) Although i find the Eheim 2250 to be much more powerfull then the 2080 which drives my co2.

 

That's good progress, sounds a lot better. You will see that this will give you easier management of your tank. Don't care too much about pearling, that's badly overrated. Watch your plants closely over the next weeks with their development.

regards,
dutchy

 

Upgrading to have less lag can done by more reactor surface, higher flow through the reactor or a higher flow of CO2. If you have a pH controlled system, it's easy to just turn open the CO2 flow more. The pH reactor will compensate. If your current setup is maxxed out, you'll have to think about upgrading the hardware. Thinking big is the right attitude here.

Of course you could run the reactor with a separate pump, because they take a lot of capacity from your filter system. I don't have experience with the suggested reactor though.

regards,
dutchy

 

Your plants need up to two weeks to adapt to changing circumstances, like less light. But what kind of an improvement are you looking for? Faster growth happens with more light, but this will make it hard for you to keep up with the CO2 demand. By lowering the light, that becomes easier, but slows growth down. It's a trade-off, but a good one. Less frequent maintainance and less algae.

If you want to improve on plants quality and quantative wise, think CO2 first, second and third. Then think about problems with nutrients and other parameters.

Every water parameter can cause problems when excessive, KH, GH etc. Depends of the actual values.

You started the topic a week ago. Maybe you just need some patience.

regards,
dutchy

 

+1

Make a change and resist temptation to fiddle for a good couple of weeks. Take a photo of the tank pre-change, wait a couple of weeks, take another photo. Repeat. ;-)

 

I am not grasping the problem. Doesn't the dropchecker indicate plenty of CO2? If lag is a problem due to the CO2 being shut off when lights are off why not just start the CO2 a couple of hours before lights on?

 

I couldn't agree more with what Gerryd mentioned earlier regarding the keeping of filtration and CO2 systems seperate. They are both such important systems that keeping them seperate is the way to go. If you have the systems combined, as the filtration blocks up over time, which of course it will, this is in turn going to have and impact on CO2.

First thing I would do is work on seperating the filtration and CO2 systems.

Quickest and easiest thing you could do is build a needle wheel impellor, as Tom has shown, place it down the back corner of thank and systematically increase the CO2 supply to it until the plants start to take off.

Set and forget the lights (2 tubes seems fine to me too). Set and forget the nutrient dosing (full EI).

Focus on CO2.

The needle wheel isn't the most efficient in terms of CO2 usage, you'll find yourself re-filling the bottle more often, but at least it will get you up and running and show you what good plant growth looks like.

You can then swap out the needle wheel for something like an AM1000 + dedicated pump if you want to later on.

Scott.

 

Hi Sam,

If going with a reactor, I would just build one myself based on Tom's specs if you have access to basic pvc and some fittings...$20 usd and you are done. Run it with about 400-500 gph (overpower it and use a ball valve to control flow) and you should be good to go.

Maybe even combine methods. Needle wheels are quick and easy and also add more flow. Combine it with a reactor.

I had the A1000 on my 180 and could never get it to produce enough... The issue is the small tube size does not allow sufficient flow through the reactor.

I use a needle wheel now and I was using a mazzei.

C02 leaves the water quickly so the direction and dwell time of the c02 in the water is also very important.