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Hi.

I recently discovered my refractometer was out giving me higher reading. On advice from my

local pet store I have been maintaining a salinity level of about 1.020, however after recalibrating

my refractometer the real levels are around 1.015.

What are the health effects to the livestock (no corals) and what time frame

should be applied to raise salinity levels back to 1.020.

Also what are everyone's views on required salinity levels.

Thanks in advance for any advice.

Stuart.

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I think with fish anything from around 1.021 to 1.026 is ok. Thats just my thoughts anyway.

I maintain mine at 1.026 as that is what seawater generally is. If you have a look at this calculator it will tell you what kind of changes are required to raise the salinity to a higher amount: SaltyZoo's Salinity Adjustment Calculator

I'm not too sure on what the health impacts are as I always try to keep it as close as possible to the natural level. Depending on how big the tank is I would look at raising the level slowly over the space of a week or so.

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I try for a constant 1.025 at 25 degC

but without an auto top up

its usually between 1.024 and 1.027

Effects depends on the fish hey

many fish are fine with it a bit higher (often lagoon fish)

Many fish are fine with it a bit lower (estuary fish)

but most reef fish do a lot better when its stable, as do corals.

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