hi grey fox,
you can buy it...brands like nutrafin cycle etc. basically just filter bacteria.
to make it fizz, you have to make it happen. i had a 2x2htx1.5 ft tank at 60W no fizz for over a year. change bulbs to get more power[fl to pl] 72W and fizzzzz...ha ha... just ordinary phillips daylight pl bulbs. it's still only 2WPG, perhaps the ambient light or reflectors play a role too.
if you have doubts. it's a process of elimination. 20ppm+ co2 is enough already. 35ppm is probably wasted. i noticed pearling almost immediately when the balance is right but it also goes away quickly when the ferts run out. this in turn became a bga bba nightmare. so sometimes going slow is good...
surface skimmer...my fav is eheim. there is atman one as well. these are the two common designs
You can if you dare to fail - Stan Chung
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