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Hi I have a 10 gallon spa tank I have it set up on a auto water change everyday 12 times a day I change 316 ml every time is there a issue with doing this many water changes everything is doing great just wanted other inputs 

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Jeff Hood

So your changing 10% per day?   That’s quite a bit.  Do you need to change that much to keep up with nutrients?   Feeding heavy?   I’d think 10-20% per week would be plenty.  

    In my 20 gallon I change around a liter a day which is around 10% per week.  

There is nothing wrong with it as long as your corals are not starved of nutrients. 

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