Need some help with roots.

Beer42O said:

H202 AKA hydrogen peroxide. I see the most common use is 50% @ 1ml p/L= 4ml p/gallon. I have 5 gallons =20ml of 50%. Now, i can only find 3%. 50/3= 17. so you would need 17x the amount of 3% that you would need of 50%. now with that said @ 4mL p/g @ 50% = 68. so you need 68ml p/g of 3%. So if i use 5 gallons it would be 5x68=340. So, mathematically 340ml's of 3% would give me the same amount 20mls of 50% would. so, can i add 340mLs of 3% hydrogen peroxide every 4 days to my res and be okay? or will it not work?

Also, it seems a gallon of 35% h202 is about 50 buxx. 32oz of 3% =$2. there are 128oz to a gallon. So for apples to apples it would be $60 p/g 50% and $8 p/g of 3%. Now going by same math before, but with 35% instead of 50%... 35/3= 11.5. So it will take 11.5x the amount of 3% it would of 35%. So, it would cost about $90 to do it with 3% as opposed to $60 for 35%. But 35% would be + shipping etc... obviously its cheaper to buy 35% but its hard to find. So for the few buxx u save is it worth the hassle? Or can you NOT use 3% like this? anyone ever tried? or, any tips on local places that carry higher % h202?

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morrisgreenberg said:

Also, Im not so sure you should be using H2O2 with hygrozyme? seems like one would counteract the other.many people say not to use H2o2 with hygrozyme, but i have good success with it, when i top off i dont add it, but initially i take it easy and go 1ML/Gal cus it just might kill the hygrozyme effects...

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morrisgreenberg said:

yes indeed sqaure, thats why 35%h2o2 i use 3ml/gal, with hygro i go with 1ml

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Beer42O said:

Items needed:
1. Milwaukee SMS122 continous ph monitor/controller - $83 - You can get these off ebay, there's tons of them. Just be sure to get the correct model number, as you must have this one to perform the acid dosing. They do have ones that are only monitors, and that's obiously not what you want. Just match up the model number to be sure you're getting the right one.

2. Smallest submersible pump you can find - $10 - I found one at a hardware store for $10 and it's an extremely low flowrate, only 30 gph. Look for adjustable ones too, I should be able to adjust mine lower.

3. Acid Reservoir - $3 - I just bought a juice pitcher for a few bucks. Make sure that it's plastic, so that it will hold up to the acid just fine. Also, it's important to have a way for air to get in through the top, as it will be needed as you pump the acid out.

4. Appropriate tubing - $2 - you'll likely need 10 feet or less, unless you're in an abnormal situation. Bring your new pump with and just find the smallest tubing that your pump is capable of using. I used 1/4" inside diameter. Color makes no difference, as nothing will grow in the acid anyway.

TOTAL COST: $98

Let's get building!

Well, I guess I'd hardly call it building, but bear with me. This should only take you 20 minutes at the most once you have all your supplies. First, calibrate your new ph meter with two points using 7 and 4 ph buffer solutions. The centerpoint will be off most likely, but the slope will probably already be pretty close. The instructions with the monitor are pretty clear on this process.

So, start by hanging your monitor on the wall so you can easily keep an eye on it while it's running. First off, you'll notice what looks like a ac to dc adapter with a plug in it. This actually does not power the monitor, rather it's a switch that the unit controls. Look at the pictures to understand the setup, but basically when the ph rises above your setpoint, it will turn on this outlet. This is the key to the functioning of this system. Plug that in, and then find the ac-dc adapter for the unit. Attach the ph probe and your monitor should be completly setup! Now, we need to set up our dosing system.

The juice pitcher that you had should be filled with acid. I'm not sure yet what the best concentration is, perhaps we can report our findings as we test it out. But basically, the more concentrated it is, the longer it will be maintainance free. Now, plug your submersible pump into the switch that is controlled by the ph meter. Connect your tubing to the pump, and place it in your acid reservoir.

Now this next part may be key to prevent over dosing! I have used a cable tie to attach my acid tube right to my ph probe. It's up the probe housing from the sensor several centimeters, however by injecting the acid near the probe, it will cause pulses off acid instead of pumping large amounts as the ph fluctuates. Feel free to experiment, but just be careful of what could happen and keep a close eye on it until you're confident you can trust it.

So, go ahead and set your setpoint and sit back to watch your meter automatically dose! If you get more acid flow than you would like, choke back your pump or put a c-clamp on the tube to reduce flow.

I welcome input and discussion on this. I've got it setup, but I just finished a rebuild on my hydro system, so I've gotta wait for the sealants to dry before I can fully test it. I hope this helps alot of people! "

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