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Dosing during cycling


26 Oct 2020
Aberdeen, UK
Hi all,

I've been a lurker for awhile and finally decided to make and account as I can't seem to find an answer to the question I have. Hopefully I'll have some good results to share someday soon too!

I have a Fluval Flex 57L arriving this week and have a nice setup planned and everything in place to begin.

The tank will contain some RCS and a Betta which are being upgraded from their current 20L and so I plan, once established, on alternate dosing Tropica Specialised and Tropica Premium at 2ml per day with a weekly 50% water change. This is based on everything I have read to date and I think is a reasonable approach, open to critique though.

The problem I have is the initial cycling stages. I plan on doing a 50% change every 2 days for 2 weeks and then every three days for another 2 weeks while I establish the tank and get the plant growth going and nitrogen cycle started.

I'm not sure how I should dose during this time, should I stick with 2ml per day or up it due to the constant reset from water changes?

All help greatly received and I look forward to getting to know you all!


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