Question about Equilibrium and sick fish - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 03-18-2019, 05:08 PM Thread Starter
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Question about Equilibrium and sick fish

My tap water is very soft around 1-2 gh 0-1 kh. I see it recommended that GH in in planted tank should be 3+ for healthy plants. This ends up requiring that I raise the GH of my tank about 2 degrees+ whenever I change water in my tank.

The measurement to raise 20 gallons 3 degrees its 1 table spoon.

For a 50% water change on a 20 gallon I add about 3/4 tsp to raise it about 1.5 degrees. It doesn't happen every water change, but it seems like over the course of 1-2 years I will usually have fish that develop some issues from water parameters fluctuating. I'm not sure if its because I'm not changing exactly 50% or something else. It doesn't seem like the water possibly changing .5-1 degree would be a lot, but they're nano fish (CPDs). It doesn't seem to affect my pygmy cories / shrimp / guppies.

I have no water quality issues. My ammonia, nitrite are always 0 and nitrates stay below 10.

big time
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post #2 of 5 (permalink) Old 03-18-2019, 07:08 PM
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Hi @mexicatz,

I seriously doubt that adjusting the water parameters is effecting the fish. In the wild fish are subject to changing water parameters on a continuous basis. Dry season with concentrated minerals, rainy season with substantially less minerals, downpour when water volume in a stream can change substantially in an hour or less.

Specifically what fish issues do you believe are related to fluctuating water hardness?

Now that said, some species (like livebearers) actually thrive in harder water verses soft water.

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post #3 of 5 (permalink) Old 03-18-2019, 07:54 PM Thread Starter
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Seems to only happen with my celestial pearl danios. will be different illnesses. I've had I think 4 die from developing a single slime coat spot over the course of like a year (not all at once and at different times). I only successfully treated it once (no fuzz). Just had one die a couple days ago from dropsy.

The illnesses don't seem contagious to the others and I can only believe the cause might be the fluctuating parameter since I haven't been able to think of anything else. Only thing was the I got the majority from a single shipper and its possible those all developed the same illness but at different times

big time
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post #4 of 5 (permalink) Old 03-18-2019, 08:33 PM
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Hi @mexicatz,

Celestial Pearl Danios (CPD / Danio margaritatus) are somewhat new the hobby. They were discovered in a relatively small area in Myanmar and at one point were thought to possibly be extinct in the wild due to over-fishing. Almost all of the fish in the hobby come from commercial fish hatcheries and I suspect the species has been inbred so much as to effect their health and vigor.

There are still some wild caught specimens being brought into the country with very small specimens costing $6.00 or more. Of course, with wild caught specimens they need to be de-wormed and treated for fungus and diseases.

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post #5 of 5 (permalink) Old 03-19-2019, 10:15 PM
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Raising the GH won't have an adverse effect on livestock. The plants require the Ca/Mg/K that Equilibrium offers in order to thrive, so don't hesitate to add it when needed. The only fluctuating parameter that should be a concern is KH. As long as your KH doesn't change rapidly (more than 2 dKH in a day) then you should be fine.
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