Switching from sand to gravel

TML29

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Jan 11, 2007
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Missouri
I have a 125g tank with sand as substrate. Due to the messy nature of my oscar and my inability to vacuum the sand, I've decided to switch to gravel to improve water quality. My intention is to gradually (perhaps in the course of 4-6 days) remove the sand and eventually replace it with gravel. I don't want to take fish out but at the same time do not want to disturb their environment and/or bio-balance too much. Do you have any suggestions to make this transition relatively stress free for my fish?
 
Hmmm, that's a big undertaking, but doable. First of all, make sure you turn off your filters each time before you start removing sand.
Do you have a python? It can be somewhat useful in removing sand . . . but not great, just isn't as stressfull. Just work one area at a time--visually divide the tank into fourths or fifths--then allow to settle for a day or two so the fish will relax. When you put in the gravel, don't just dump it into the tank--that'll freak 'em out for sure!!
Good luck; I use sand in all my tanks, and grimace at the thought of changing over the big ones!!
 
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I do have a python but I'm going to think of a way to stop the sand from going down the drain. The hard part will be taking the sand out in sufficient manner. Using a fish net perhaps?
 
I'd do it in such a way as to allow you keep some of it in the tank in a some kind of net (tights/pantyhose) for a few days after the change; you could otherwise lose a significant amount of beneficial bacteria.

I would :

a) wash/rinse new substrate
b) remove fish
b) drain tank
c) scoop out substrate into some kind of container...newly bought dustpan might be useful to scoop with.
d) add new substrate
e) refill
f) add fish
g) put a load of old substrate into tights/pantyhose and place in tank for a week.

I would be inclined to have the fish out of the tank when doing this. Set up a large rubbermaid type thing or two if you don't have a spare tank, run filters and heaters on them and work like the clappers (might not even need heaters this time of year actually). I've not done it myself though...
 
if there's any way to drain the python outside rather than down the drain, that's the method i would use. you can put the end into a bucket or something so there's not sand all over the yard. other than that, it's very simple. work slowly to avoid clogs though.
 
I'd do it in such a way as to allow you keep some of it in the tank in a some kind of net (tights/pantyhose) for a few days after the change; you could otherwise lose a significant amount of beneficial bacteria.

I would :

a) wash/rinse new substrate
b) remove fish


I thought about removing the fish but I would have to transfer the oscar to the 55g with the other oscar and they'd fight to death. I have one empty tank but it's ok 10g. Plus, it was heck of a struggle removing him last time. The fella would rather lose them scales and skins than being caught in a net.


I wonder if I only take the sand out a bit at a time, like over the course of 4-5 days or so, will there be enough bacteria in the tank? I have two filters, one Rena xP3 and one AquaClear 110.
 
I'd do it in such a way as to allow you keep some of it in the tank in a some kind of net (tights/pantyhose) for a few days after the change; you could otherwise lose a significant amount of beneficial bacteria.

I would :

a) wash/rinse new substrate
b) remove fish


I thought about removing the fish but I would have to transfer the oscar to the 55g with the other oscar and they'd fight to death. I have one empty tank but it's ok 10g. Plus, it was heck of a struggle removing him last time. The fella would rather lose them scales and skins than being caught in a net.


I wonder if I only take the sand out a bit at a time, like over the course of 4-5 days or so, will there be enough bacteria in the tank? I have two filters, one Rena xP3 and one AquaClear 110.

Should be fine - just more a pain in the butt for you.

If you did do it by removing all in one go, you could the O in a big rubbermaid container on his own with a filter and a heater while working.
 
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