Goldie Blue Posted May 27, 2022 Share Posted May 27, 2022 I was reading a few things based on some advice I received here over the last week or so after issues in my tank. I was under the impression you add Prime based on how much new water you're adding to the tank after your water change. Example, I take 20g out, so I dose 2mL for that 20g, even though my tank is 55g. That is what I have been doing all along. Two articles I read said you dose for how many gallons are in your entire tank, not just what you're replacing. So off I go to look at the bottle of Prime. Directions are as follow: Quote Use 1 capful (5 mL) for each 200 L (50 US gallons) of new water. For smaller volumes, please note each cap thread is approximately 1 mL. May be added to aquarium directly, but better if added to new water first. If adding directly to aquarium, base dose on aquarium volume. Sulfur odor is normal. For exceptionally high chloramine concentrations, a double dose may be used safely. To detoxify nitrite in an emergency, up to 5 times normal dose may be used. If temperature is > 30 °C (86 °F) and chlorine or ammonia levels are low, use a half dose. When I do my water changes I use a Python, the water goes right into the tank from the sink, so I add Prime right to my tank. Should I therefore be dosing for 55 gallons (my tank size) regardless of how much water I am changing/adding back in? I feel incredibly stupid for even asking this, but I really want to make sure I am doing this right. 1 Link to comment Share on other sites More sharing options...
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