Miss Wiggle
Practically perfect in every way
Well 22L is roughly half of 38L so use roughly half of the recommended dosage.
when you work it out you need to use 1/2 ml respectivley for every 7.6l of water. 22 isn't roughly half of 28, it's 6 off, which is nearly as much as another ml out on your dosing. you should always be careful when dosing meds and work it out exactly. it's easy enough to do.
if you dose 5ml for every 38, then divide 38 by 5 and this is how many l for each ml. it's 7.6. then divide your tank size by 7.6 and it gives you exactly how many ml you need to use.
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That's true but if you don't have a graduated cyclinder with 1ml increments it's pretty much all guessing anyway.![]()
API products only have 1ml, 5ml, and 10ml increments in the measuring cap. To get 3ml you have to measure out 1ml three times and the margin of error will be increased defeating the whole purpose of trying to be accurate in the first place.
i do it with ferts and measure 1 ml 3 times over. also with a 5ml syringe, even if your just guessing, guessing closer to 3/5 instead of guessing 1/2 your still gonna be closer.
just depends what your dosing, some things are more harmful if you overdose than others and i don't always know what they are so i try to be and advise others to be accurate when dosing unless i know for definate that particular product is safe if you go a bit over. better safe than sorry, especially when it's someone else's fish.