And too many people seem obsessed by the bubbles not being microscopic.
Yes the mist lasts an hour or so to be replaced with small bubbles.
Yes the bubbles rise to the surface.
Yes some is lost.
Is my DC blue from being short of CO2. No its almost yellow.
Do I make sure the surface is still to prevent lossage from gaseous exchange. My water surface is like a wave machine. lol
Does my Gas bottle run out quickly due to me injecting more CO2 to cope with the loss due to water movement on the surface? Last 600g bottle lasted 4 months @ 4bps (currently running @ 2bps)
Mine gets cleaned fortnightly not from algae on it but more the detritus/food that settles in the cup.
I have just taken these 4 pics to prove my point
1: The diffusor is producing bubbles and they are only coming out of one side of the diffusor (If I leave it longer in the bleach solution it seems to come from the whole surface but I prefer to do 5 mins then 5 in dechlor so I can take it out and put it in during a water change.)
2: The Lily outlet is 2/3 submerged and 1/3 above the water surface meaning that it produces a mini rapid on the water surface. This draws oxygen into the water and also pushes the water current around the tank better. The water clarity is superb and no film/oil/protein ever builds up on the surface. This pic is from below the water surface looking upward.
3: The drop checker on the opposite side of the tank is almost yellow telling me that I have over 30ppm CO2 in the water. This doesn't worry me as (see pic 2) I am drawing in more oxygen than most people do. (That is not my finger over the lense it is a Nymphea Rubra leave in the foregound)
4: The bubble counter is currently set to 1.5-2bps which should mean that on this 33USG tank a 600g disposable bottle should last 6-8 months.
All I am trying to say is really this. If your DC says that your level is OK then the diffusor is working. It doesn't matter if the bubbles are rising to the surface or if they are larger than mist or if they are only coming out of 1 part of the diffusor. What you want is 30ppm and the DC is green/yellow then walk away happy.
Andy