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How soon after a 50% water change can I add new fish Are particles safe for fish during gravel clean2007-11-24 23:34:54

I have a 55 gallon with 3 2" cichlids, 1 6" jack demsey, an algae eater, and a narrow black fish, don't know what it is but he has a hammerhead and my son calls him a shark, but he's not the typical silver type mini shark. He's 5" --> anyone know what he might be called?.

I have few fish & I haven't done a water change in quite a while -- about 10 months. We have very hard water so I know the water gets harder if you don't do water changes and just keep topping off the tank, however, all of the fish were happy anyway & I had no fatalities.

(1) I did a half tank water change 2 days ago. How soon can I add new fish?

(2) While vacuumming the gravel, as you can imagine, tons of particles fog the tank during my cleaning. I felt really bad. Is this bad for this fish? Is it hard for them to breathe?

(3) Is it normal for fish to open and close there mouth inside the tank? I never noticed but am nervous

(4) Can I add Oscars to my cichlid/jjack demsey tank?

Answers:

I would not add a Oscar for when a Oscar reaches it's adult size it needs at least 55 gallons by itself as far as when can you add fish you can do it now as long as the tank is cycled just leave the new fish floating in the bag in the aquarium for 1 hr. so that they can adjust to the water temp or quarantine them first in case they are sick and as far as the water changes it depends on the size of the tank and how many fish and how hardy they are I would recommend a 50-70% water change weekly or at least every other week by the way how is the parameters and how often do you check them?

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you can addd new fish after 24 hours or instantly if you use water clorinator. particles wont hurt them try using insta clear. about 3 bucks at walmart and makes water crystal clear in 2 hours. can be added while fish are in tank. also keeping light on 24/7 causes algae build up.

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okay here goes: