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Water Hardness - Stocking

Tank Sinatra

Tank Sinatra

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Hi all,

The main is currently cycling (4 days into a silent cycle). I'm now considering my stocking options.

Both myself and my girlfriend have fallen in love with the Peacock Goby (Tateurndina ocellicauda). I'm not up to speed with the conversions of water hardness, but I found a really nice calculator in one of the threads on here.

My tap water readings are as follows:

GH: 194.8ppm
KH: 143.2ppm
PH: 7.4
Nitrates: 20ppm

Below is a screenshot of the conversion results:

Screenshot 2021-03-26 at 10.49.58.png


Here is a screenshot of the water conditions on seriously fish:

Screenshot 2021-03-26 at 10.50.12.png


Am I right in assuming that °H is also °dH? If so, I'm right on the limit for both hardness and pH. Will it be ok to keep Peacock Goby's in my water?
 
Tank Sinatra said:
Hi all,

The main is currently cycling (4 days into a silent cycle). I'm now considering my stocking options.

Both myself and my girlfriend have fallen in love with the Peacock Goby (Tateurndina ocellicauda). I'm not up to speed with the conversions of water hardness, but I found a really nice calculator in one of the threads on here.

My tap water readings are as follows:

GH: 194.8ppm
KH: 143.2ppm
PH: 7.4
Nitrates: 20ppm

Below is a screenshot of the conversion results:

View attachment 132655

Here is a screenshot of the water conditions on seriously fish:

View attachment 132656

Am I right in assuming that °H is also °dH? If so, I'm right on the limit for both hardness and pH. Will it be ok to keep Peacock Goby's in my water?
Click to expand...
I found something online saying they can live in hardness of 107-212 ppm so your within limits
 
It's a bit high but they should be fine. They normally come from water with a GH around 100-150ppm. Yours is 200pm so not a big issue unless they are wild caught, and that is unlikely.
 
When I had them they spent most of their time in the lower half of the tank.

Make sure you know how to sex them. It is tricky with juveniles as the males head hasn't developed the hump yet. Another way to tell is the the colour of the edges of their fins. Females have a darker edge to the fin which runs underneath towards the tail, while males don't. Males are territorial which is why you need to be able to sex them as two males will fight over territory.
These fish like to breed in caves, the tighter the better. The male guards the eggs until they hatch then it's every fry for itself. Even if the eggs manage to avoid being eaten, the fry will be if there are adult fish of any species in the same tank.
 
There's another hardness calculator useful for members in the UK as water companies here often use mg/l calcium which isn't listed in the one above (it's given as mg Ca²⁺/l)

Hardness of water, Cactus2000

Online conversion of the hardness of water into a number of international units.
www.cactus2000.de
 
Essjay said:
When I had them they spent most of their time in the lower half of the tank.

Make sure you know how to sex them. It is tricky with juveniles as the males head hasn't developed the hump yet. Another way to tell is the the colour of the edges of their fins. Females have a darker edge to the fin which runs underneath towards the tail, while males don't. Males are territorial which is why you need to be able to sex them as two males will fight over territory.
These fish like to breed in caves, the tighter the better. The male guards the eggs until they hatch then it's every fry for itself. Even if the eggs manage to avoid being eaten, the fry will be if there are adult fish of any species in the same tank.
Click to expand...
That's really useful to know. I have a couple of caves in the tank already, but the entrance is fairly wide compared to the size of the Peacocks. So I may need to look at getting some PVC pipes or smaller caves.

Will the Peacocks eat their own fry?
 
Virtually all fish will eat their own fry, I'm afraid. Some species will look after their fry for a while, but once they grow big enough, or the parents breed again, they will also look on fry as food.

I used inch diameter pvc pipes, about 3 inches long. You can make them look prettier by covering them with aquarium sealant and rolling them in sand or gravel. Mine bred in tubes so narrow it was a miracle they both managed to fit in it.
 
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