peedeers

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Dont the noae need to have a thin white margin on the tear drops? Heres my noae Sent from Singapore Reef Club mobile app

Close the air intake completely and then crack it open very slightly. You probably are letting in too much air. Pm if you need more help. Sent from Singapore Reef Club mobile app

Great thread and post. We all know that viruses and bacteria exist on every coral. They actually make up the holobiont, but they are really separated from the coral tissue by the mucus layer. So it becomes a problem only when the mucus layer is breached due to some stressors. That gives pathogens access to the coral tissue which could then translate to RTN/STN. One of the things I am very keen to understand is how DOC ( especially from algal photosynthates) impacts this mucus breach given other stressors (temperature swings etc). So in a high DOC environment, due to increased bacterial activity around the coral, it could create an anoxic region. And this anoxic region could serve to host pathogens that thrive in this anoxic environment. Especially during night when o2 levels are lower - could explain why you sometimes see STN/RTN happen overnight. I think there has been some research around this - but not enough. Also keen to understand if there is a difference in the levels of DOC generated by micro versus macro algae. We often keep macros in chaeto reactors - so it may be important to understand how that the DOC they produce might affect the corals we want to keep.

I meant if o2 is lower in the air intake.. in my last sentence. Sent from Singapore Reef Club mobile app

I think both of you are saying the same thing. People tend to perceive the skimmer as a mechanism to inject O2 into the water. Thats not true. A skimmer enables additional gas exchange so that the chemical potential of O2 or co2 in the air intake is same as that of the dissolved gases in the water. So it is tending towards equilibrium. So if O2 is higher in the intake air, then it will appear as though the skimmer is reducing DO in the water. Sent from Singapore Reef Club mobile app

If you have problem with PH first you need to check if the water in your tank is fully aerated. If the co2 in the surrounding air is high then even if your tank water is at equilibrium with the air outside, the levels of carbonic acid in the water will be high, which means more fre H+ leading to highe PH. This is rare in Singapore (unlike colder countries) we keep our windows open so the co2 levels in the air in your home should already be low (o.04 percent) almost. In this case if you scrub the co2 using media this will bring down carbonic acid in the tank but the effects maybe only temporary till the water attains equilibrium with the air. The other causes of ph being low is reapiration releasing co2 - eapecially at night. Or Co2 gas from your carx not diffusing into the air before getting into the tank. In thesr cases its is best to use calcium hydroxide ( kalkwasser) to supplement and remove exces co2 in the water. Also alkalinity being low can be a cause of low PH, but in a badly awrated tank you might need to drive alk upto over 12 to reacv PH levels of 8.3. So there is no straightforward answer as to whether co2 media has increases ph and by how much. Since you have never measured PH best is it to start with that before thinking about boosting. Sent from Singapore Reef Club mobile app

At the end its semantics, but shifts or trigger can happen at low or high organics. Good write-up btw, dont see anything other than classified posts on the forum, so this is great. Sent from Singapore Reef Club mobile app

Yes thats my point. Does not matter whether organics are high or not for them to trigger. Sent from Singapore Reef Club mobile app

You said dinos and cyanos decreased your ORP levels earlier ? Heres a study that phosphates enhance the growth of toxic dinos https://res.mdpi.com/d_attachment/sustainability/sustainability-12-04992/article_deploy/sustainability-12-04992.pdf Heres a study that shows uptake of organic and inorganic N on Ostreopsis- the kind that we usually deal with in our tanks https://www.researchgate.net/publication/316157113_Uptake_of_dissolved_inorganic_and_organic_nitrogen_by_the_benthic_toxic_dinoflagellate_Ostreopsis_cf_ovata Sent from Singapore Reef Club mobile app

Okay want clear that it was just based your own ancedotal observation. If you looked at orp, you could also argue that maybr dinos/cyano causes reduced oxygen levels . In my case I have not seen that happening though. Activated carbon has had no impact on cyanos or dinos. Also aside from just correllation how would you explain organics causing dinos? Sent from Singapore Reef Club mobile app

This is not true. Where did you get the info that highrt organics trigger dinos, cyano and inorganics trigger brown algae? Sent from Singapore Reef Club mobile app

Nopox is useless without a skimmer. Unless you do very large water changes. Sent from Singapore Reef Club mobile app

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This is Reserved until Sat Sent from Singapore Reef Club mobile app

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Peedeers, Design 3,L,1 Sent from Singapore Reef Club mobile app

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Selling unopened box of Original tropic marin balling components a,b,c powders. Pm if interested. Collection in pasir ris. Price 45 sgd. Sent from Singapore Reef Club mobile app