limescale everywhere in the tank

[csuvi]

i live in an area with very hard water. used this 30l tank mostly for babies (corys, danios).

in the last couple of months their seems to be a lot of limescale developing inside the tank, not just on the top, but pretty much everywhere. currently there is 2 small sterbai living in there. is the limescale harmful for the corys, should i take them out?

i cleaned the tank 2 weeks ago, but it all came back very quickly. i used this tank for almost 1 year, but this has never happened, only recently. any advice on how to get rid of it, and chemicals i can add to the water, which are not harmful to the fish, but could solve the problem?

 

[csuvi]

i also have a big tank (300l), and never had this problem before

 

[Andy Pierce]

Looks biologic to me (diatoms etc.) rather than inorganic like limescale. Unless you've added something chemical that could induce precipitation stuff that comes back this fast is reproducing itself.

 

[csuvi]

any suggestions how to get rid of it?

 

[Andy Pierce]

It won't harm your livestock is the good news. Try reposting as an algae query and provide the info suggested to help us: Please read the guidelines for Algae help!

 

[_Maq_]

Your plants and algae are forced to use HCO3- (instead of CO2) and that may lead up to CaCO3 precipitation.
Pleeeease, don't hesitate and get reverse osmosis. You'll discover quite a new, beautiful world.

 

[Aqua sobriquet]

As it’s only a small tank is there any way you can collect rainwater for it? After Darrels helpful suggestion that’s what I’ve mostly been using in my 60L and 37L Nano’s. Depending how much tap water I add I can get a little limescale but not much and it’s easily removed. My Corydoras, shrimps and plants are all thriving.