Dwarf Neon Rainbow Fish - Erratic, Skittish And Strange Behaviour.

George1992

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I have owned my 12 rainbows for about four months. They are usually very confident fish that even come to the front when they see you to take food. However, over that past few days they have been acting odd. They will stay in the same spot in a very tight shoal, occasionally darting from one end of the tank to the other in their tight shoal. They also seem skittish and dart around in a shoal when someone walks past the tank. I’ve just tested my water and all seems normal. PH is around 7.2 and nitrates are showing at around 20. I assume this is because I’ve been using tropica specialised to fertilise.

What could be causing this?
 

Momgoose56

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I have owned my 12 rainbows for about four months. They are usually very confident fish that even come to the front when they see you to take food. However, over that past few days they have been acting odd. They will stay in the same spot in a very tight shoal, occasionally darting from one end of the tank to the other in their tight shoal. They also seem skittish and dart around in a shoal when someone walks past the tank. I’ve just tested my water and all seems normal. PH is around 7.2 and nitrates are showing at around 20. I assume this is because I’ve been using tropica specialised to fertilise.

What could be causing this?
If they started acting like that at about the same time you started using that fertilizer, that's probably it.
 
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George1992

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Thanks. I have been using the fertiliser for about 6 weeks. I decided to temporarily stop using it and did a 50% water change. The strange, skittish behaviour is still going on. Could anything else be causing this?
 

Momgoose56

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Thanks. I have been using the fertiliser for about 6 weeks. I decided to temporarily stop using it and did a 50% water change. The strange, skittish behaviour is still going on. Could anything else be causing this?
Your tank is cycled I assume? What is your nitrate level running? How about your tank pH vs. your tap water pH?
 
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George1992

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Yes it is. I tested that water last night before a 50% water change. PH is around 7.2 and nitrates were around 20. I find the strips hard to read with specific accuracy. PH is standard for what I get out the tap.

We had family round on Saturday and around 8 people sat at a table not far from the tank for a few hours. This is when the strange behaviour started. As if the fish have been scared by a large number of people. When I sneak up to the tank they are acting normal and only go into this odd shoaling behaviour when they notice me.
 

Momgoose56

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Yes it is. I tested that water last night before a 50% water change. PH is around 7.2 and nitrates were around 20. I find the strips hard to read with specific accuracy. PH is standard for what I get out the tap.

We had family round on Saturday and around 8 people sat at a table not far from the tank for a few hours. This is when the strange behaviour started. As if the fish have been scared by a large number of people. When I sneak up to the tank they are acting normal and only go into this odd soaking behaviour when they notice me.
Maybe they just need some time. My fish- always either rush the glass for food or streak around the tank when it's approached. Fish are naturally skittish. They have a lot of predatory enemies in nature and instinct is something that you can't control in them. All your params are perfect im guessing that they are probably acting completely normal for fish.
 
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