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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

So far happy with my hailea

hi just checking if anyone is keeping stripeys with yellow or purple tangs and if they are aggressive towards the stripeys Sent from Singapore Reef Club mobile app

Decom sale!!! Hailea - HK-300A Only used a few times and decided to sell. Chill 200+ liters very quickly. Only used on freshwater. Internal and external Condition are superb! [emoji106] Letting go at SGD 390/- Sent from Singapore Reef Club mobile app

/accidentally posted This actually make sense because our reef becomes supeesaturated due to photosynthesis. So perhaps additional skimmer for gaseous exchange is not needed/counter productive during day light hours.

When I installed a DO probe to monitor the variation of DO in the aquarium, the results was rather interesting. When the skimmer is on at night, it does increase the DO as expected. But having the skimmer on during light hours, actually lowers the DO.

I agree with darrance, if you really want to get into this hobby, you're gonna save quite a bit of money in the long run if you get a proper/bigger chiller. If you are just trying out, a fan/cheap shrimp nano chiller would be far more friendly on the wallet. Those nano chillers are normally thermoelectric, not a lot of moving parts for it to really break, just make sure to get from a good seller. Without chiller or fan also can, just keep your tank in a cool shaded area, and don't let temp spike above 28°C. I've kept a 10 Gal without chiller for a long time without much issue (keeping mainly soft coral and easy LPS/SPS). But ofc if you plan to keep anemone and other sensitive SPS, chiller is strongly recommended. Hailea is a good, reliable and cheap brand, lots of users in SG. As darrance had said, try to get the newer HK model if space/budget permits as its much quieter/efficient.

Can consider HK 150A if space allow. I use it for my 50litres nano preciously. Now upgrade to 170litres and still can continue to use. Can save money if you want to upgrade one day Sent from Singapore Reef Club mobile app

Brightwell neo nitro uses a mix of both potassium nitrate and sodium nitrate. You could use Laudwolf sodium nitrate 99.6% (which is food grade from nine life.sg). To be honest I don't find a real cost saving vs. commercial products for nitrate. Plus you need to be careful of the dose vs. increases in salinity. Here is a good calculator to help you. http://www.theplantedtank.co.uk/calculator.htm Sent from Singapore Reef Club mobile app