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I'm using these to balance CO2 between two reactors, a needle valve is positioned prior to them to control CO2 output. Cheap and effective.

No idea. May be from competition from other platforms such as Facebook like many message boards :(. BTW, aquaticquotient.com is still active. Some MAC's members post there too. But today the system is down and seems to lose recent data from Dec last year up to the present. Yesterday it was still...

It still does some good. The air there are not really THAT saturated with moisture. (How can I know? :rolleyes:). In the rainy season, the evaporation rate will be lower but the temperature in this season will be cooler as well. Actually, it is in the rainy season (there is no winter)...

That sounds good because small fans are very noisy. Just make sure it doesn't drop into the tank.

It does cool the tank water down, in my experience. 28.5°C in 32°C room with lights on for a 340l tank is possible (with 5 litres of evaporation a day). Someone may do a bit better than this but I think this is near the limit for fans-on-tank method.

I've heard much about using mini fridges. But there is also some info against using it to cool an aquarium. Their reason is a fridge is designed to cool a sealed area. When you close the door, much of the heat from outside can't affect the inside of the fridge. This way the compressor can be...

No because there is no evaporation. Evaporation is required to get lower temp than the room temp.

That will not help much because the best that method can do is just lower the water temp down to room temp. On the other hand placing a cooling fan(s) above the tank water can make the water cooler than the room temp by evaporation effect.

There was a discussion about it here :) https://www.ukaps.org/forum/threads/ocean-free-hydra-electro-plate-filtration-thoughts-please.35913/

Calcium nitrate [Ca(NO3)2.4H2O] is not a good choice if it is the only chemical you use to raise GH. Because you will get far too much nitrate for a low tech setup before getting a meaningful amount of calcium. You will get 3 PPM of nitrate for every 1 PPM of calcium from calcium nitrate. 1 PPM...

Yeah, but the video shows "sides on the base" which is weaker and doesn't look as good. Placing a sheet of glass vertically on one another generally doesn't allow proper thickness of the adhesive needed to perform its best. That's why sides on the base design is weaker than sides around the...

I've found the curved one disturb substrate too much when pulling out if I'm not careful. And it's a hassle to be careful everytime I use it. Looking at ADA's videos, they use straight ones almost exclusively.

So the internal diameter is right but the wall is too thick? I think you can pare it down with a knife to fit if finding the perfect size is too hard.

Hmmm but I read PTFE has cold creep problem unless it is the "filled" type. May be that's why Victor's High Purity series use PCTFE as the material for the seal seat while some other models use polyurethane. Well, polyurethane might not be the most suitable material for CO2. But it is easy to...

At last, the answer came from a picture of Victor's regulator seal-seat which looked very similar to my regulator's. Its sealing surface was flat but mine was bulging! Because I tightened it too much. I had figured it would give better seal with the seal ridge of the bolt. Silly me! As it...

It held the pressure! :woot: So I put it back to use and couldn't stop smiling. But an hour later, the bubble stopped, the working pressure dropped to zero. And I couldn't adjust it up, even when the adjustment bolt turned all the way... After spending hours trying to figure out what's wrong...

Since the back side of the seal was still smooth, so... hehe. I trimmed the worn side with a knife, making it as smooth as I could. Put the seal back, with the unused side facing out, and thought I'd got a new poppet valve at zero cost. I put everything back together, turned the...

I had to use a deep offset wrench to remove the hex bolt that held the poppet valve. Then it was clear that the debris was from the poppet valve sealing material which I believed was made of polyurethane. It was worn out. In case, you want to see the regulator body without its innards.

(Of course, at your own risk) Last month my 6 years old Azoo (adjustable pressure model) regulator got frozen up, literally. It was covered with frost. The gas blew through the regulator safety valve. Working pressure was beyond the max value on the gauge. It was strange that no gas was...

Using any "stiff" part will just pass on the stress from any movement to the point of contact between the barb and the cap. Glue is not reliable enough for this job. So a bulkhead is the way. This method is very good :thumbup:. There is no stiff part involved. The silicone tube acts as a...

I used to try this media. You have to wait. The water doesn't stick to the surface well when new. To confirm the issue: http://www.raingarden.us/kaldnes_bio.pdf

Without using chemicals, hmmm. I would think about using ozone (in a reactor like ones for CO2) and a bio-filter in the reservoir. Ozone can neutralise chloramine/chlorine. Then if it's chloramine, what is left is NH3/NH4... Ozone is capable of oxidising NH3 to nitrite and nitrate. But the...