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Old 12-16-2015, 11:39 PM
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I definitely didn't soak them long enough. I only soaked them for an hour or so. What controls KH and what do I need to do to maintain it? I feel silly... another parameter that I wasn't checking.
Depending on your system you might not have to dose kh/alk as long as you change you water once a month or every few weeks. If you are considering on have a sps tank you will have to add a dosser to keep you alk stable or all you sps will not be happy. When carbon dossing / bio pellets you need to keep you parameters close to NSW If your alk gets over 9 you risk burnt tips of your sps.
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Old 12-16-2015, 11:57 PM
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Just curious, if you don't test anything in the tank, how do you know you need to use biopellets? You do know that biopellets are used to reduce nitrate and phosphate, and you don't want either one to be zero, so you could cause more trouble than good by adding biopellets if they aren't needed.

If you want SPS, you'll definitely need to buy test kits for calcium and alkalinity, and should also get magnesium. Nitrate and phosphate are also important to monitor for SPS. As already mentioned, keeping a very close eye on alkalinity is the most important parameter for SPS (aside from the tank getting too hot or something haha). I also like Salifert test kits. They are easy to use, accurate, and reasonably priced. Don't bother with kits like Nutrafin or API.

SPS are high-demand corals, some less so than others (like birdnest, poccilopora, stylopora, montipora). In order to be successful you either need horseshoes up your butt or you need to watch the water parameters.
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Old 12-17-2015, 01:29 AM
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Sorry for not providing all the information. This is all making me more confused.

I am dosing Calcium, Alk and Magnesium with a 2 part dosing system and an automated doser. I am testing for the above as well as phosphates (which are not measurable in my system anymore) and occasionally nitrates. My controller also measures PH. I do have pretty low nitrates but am getting some algae growth so I added bio-pellets. All other parameters are right in the range of the above mentioned article which I often consult.

What is KH and how does it interact with Alk and PH? I am having a hard time finding any info on KH specifically.
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Old 12-17-2015, 01:35 AM
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Originally Posted by sewerman45 View Post
Sorry for not providing all the information. This is all making me more confused.

I am dosing Calcium, Alk and Magnesium with a 2 part dosing system and an automated doser. I am testing for the above as well as phosphates (which are not measurable in my system anymore) and occasionally nitrates. My controller also measures PH. I do have pretty low nitrates but am getting some algae growth so I added bio-pellets. All other parameters are right in the range of the above mentioned article which I often consult.

What is KH and how does it interact with Alk and PH? I am having a hard time finding any info on KH specifically.
Unit of alkalinity (alk) is dKH (degree of Carbon hardness), measured in dKH or ppm. Hope that clears up the confusion. If you are measuring alk (since you are dosing the big three), then you are measuing dKH.
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Old 12-17-2015, 01:55 AM
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Unit of alkalinity (alk) is dKH (degree of Carbon hardness), measured in dKH or ppm. Hope that clears up the confusion. If you are measuring alk (since you are dosing the big three), then you are measuing dKH.
Ok. This makes way more sense. KH is alk. Thank you. I was so confused for a bit there and now am more than a little embarrassed.

So I guess that my alk isn't causing any kind of problem with the bio-pellets and I should just soak them longer so they stop clumping at the top and maybe look into a better reactor. Does anyone having suggestions for a better reactor? Or should I just stick it out and use this one... or is it even worth using one when my phos is undetectable and have pretty low nitrates?
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Old 12-17-2015, 02:04 AM
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Ok. This makes way more sense. KH is alk. Thank you. I was so confused for a bit there and now am more than a little embarrassed.

So I guess that my alk isn't causing any kind of problem with the bio-pellets and I should just soak them longer so they stop clumping at the top and maybe look into a better reactor. Does anyone having suggestions for a better reactor? Or should I just stick it out and use this one... or is it even worth using one when my phos is undetectable and have pretty low nitrates?
There are people who hates biopellets and then there are people who swears by them. Biopellets seems to be one of those things which, if you can make it work, works but otherwise screws up the whole tank. My experience with biopellets was bitter and hence I moved to zeovit.

Maybe post the values of your ca,alk and mg here and people will be able to help you more. Occasionally, wrong bacteria can start feeding on the biopellets and cause the system to crash so you have to make sure biopellet is being used by the right nitrifying bacteria but first and foremost important thing with any ULNS system is to make sure that the big three are in NSW range, alk being the most important one. It has to be between 7 to 8, you can probably push it to 8.5dkh. And tumbling is very important for biopellets.

There are quite a handful of biopellet reactors on the market so choose whichever is suitable for the amount of pellets you use and the size. I think vertex has some nice ones.
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Old 12-17-2015, 02:24 AM
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I see no reason to use biopellets if there is no issue with elevated NO3 or PO4. I swear by biopellets in situations where a tank needs to be cleaned up, but once a tank is cleaned up, biopellets aren't necessary or even particularly useful IMO. Biopellets can be very aggressive.

If you like the idea of a bacteria and carbon source system, check out Prodibio BioDigest and BiOptim. You only dose them once every 15 days (just pour it in the sump), and it is not aggressive like biopellets. Anecdotally, it seems to help keep the good bacteria population up which helps to keep bad bacteria populations down. I've been using it for a few years now.
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