how long can i keep stale sea water

[typrobin]

hi all, i have about 40ltr of sea water tat was previously used for my q-tank...after my PBT passed away, i stored the water in a water container and covered up the cap...its been about 3weeks i think....can i re-use the water (wah lau 1/2 a packet of salt leh, about $20)?or will it kill my LS? any valuable advises??

[RAV-65]

u can use it to mix with more saltwater, freshly mixed or seawater.... u should use an air-pump to aerate the water 1st too...

Vincent Ho

[typrobin]

anyone can help??

[bwilly]

I dun see any problem with that.

Also not sure if the parasite is still inside the water.

Store another few more weeks to ensure the parasite

goes into their demise..

[Achilles Tang]

Bear in mind that seawater is not sterile.

They are tiny living organisms & bacteria in seawater which require oxygen to survive and these will die quickly when oxygen is gone.

These will add some bioload (not very much) into the existing water which may already contain levels of dissolved organics which continue to decompose.

(These will make the water more acidic, causing a big drop in PH.)

Bear in mind all these and not use back all this water without testing all the parameters first to rectify what's not right.