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Water change and 3-week holiday

Posted: Tue Nov 17, 2020 5:14 pm
by sxjixinlicha
Hi guys! I have a 100L tank with two juvenile GSP. I'm planning a holiday away for 3 weeks, and I'll ask my friend to feed my fish. They have been happy and healthy, and the longest period was 2 weeks without a water change. But would it be OK not to do a water change for 3 weeks? Thanks in advance!

Re: Water change and 3-week holiday

Posted: Tue Nov 17, 2020 5:54 pm
by Pufferpunk
How large are those puffers? Filtration? Will you be having someone feeding them?

Re: Water change and 3-week holiday

Posted: Tue Nov 17, 2020 7:10 pm
by sxjixinlicha
Pufferpunk wrote: Tue Nov 17, 2020 5:54 pm How large are those puffers? Filtration? Will you be having someone feeding them?
The puffers are 2inches each and I have a friend to feed them. I'm planning to ask her to feed them every 3 days, and will ask her to add 10L saltwater in the second week.

I'm using a filter for up to 200L. I also have two 50L filters, do I need to use these three together?

Re: Water change and 3-week holiday

Posted: Thu Nov 19, 2020 11:06 am
by Pufferpunk
Your tank is much too small for these fish & the water will pollute very quickly. Filters do not remove pollution, it stores it. Why would you have her add SW to the tank? What SG is it now?

Re: Water change and 3-week holiday

Posted: Thu Nov 19, 2020 2:08 pm
by sxjixinlicha
Yeah I'll ask my friend to add salt water to the tank. The SG is 1.010 now. Thanks

Re: Water change and 3-week holiday

Posted: Thu Nov 19, 2020 2:57 pm
by Pufferpunk
Please do not do that. If anything they should add fresh RO water. Your cycle is precarious at best in this seriously overstocked tank.