View Full Version : another shrimp death....

08-24-2012, 12:01 AM
After i lost my 3 rcs i decided to check all my parameters. Ammonia less than .25 but higher than 0. Nitrites 0 nitrates 0 ph off the charts gh 7'. The last 2 i cant wrap my head around. My tap tested 2-3'gh. And the tank is 3 times that... My ph is 6.8 out of tap atm... I dont have a good high range ph test cause my other one expired. Soo off the charts is the best i can say. All i habe in the tank is lava rock,driftwood, java fern algae, blk sand (package said fresh water safe and no fiz with vinagar.) Heater and sponge filter. How can my shrimp tak's ph and gh be so out of wack? No i didnt add anything to change the water chemistry. Maybe a drop or 2 of flourish comp. Thats it.... Is the difference in my tap and tank killing my shrimp?

08-24-2012, 02:22 AM
I don't know, but since they are RCS, a that high pH ammonia is probably very toxic, and even low ammonia will kill shrimp.

08-24-2012, 02:38 AM
Im still puzzled on how my ph got so high....

08-25-2012, 11:11 PM
how often are you doing WC's? What does your tap test for NitrAtes? 0 ppm nitrates is not normal. weird also bc drift wood generally lowers your PH, no?:fish:

08-26-2012, 01:50 AM
i do a weekly 1g water change on that tank, doesnt seem like much but shrimp have a very low bio load. will be doing 2g when it gets more crowded. the 0 nitrates is because the filter im using was briefly seeded. also the small bioload thing.... and java moss + loads of algae might be eating away (i think i need to reduce the lights some time in the future. but algae is fine in that tank imo).

drift wood can lower ph but i think if you cure it right and remove all the tanins then the ph lowering ability is near nill

08-26-2012, 04:08 AM
That's what I found with drift wood the tannins leach a little after its prepared and then gradually drop to negligible.

How much evaporation is going on in your shrimp tank otherwise gh shouldn't climb so much if everything is inert. However, you have lava rock and unless that rock is obsidian I bet that its not. Put some in a bucket and test after a while. That of course may still not be the cause of the shrimp death.

08-26-2012, 04:16 AM
extremely little evaporation because of a tight fitting lexan top

08-26-2012, 05:48 PM
It doesn't look like your tank is cycled. Cycling tanks have pH swings.

08-28-2012, 12:21 AM
Also rcs are really sensitive to heavy metals if you live in an old building it may come in your water my lfs gave me a totally awesome piece of carbon bamboo for my tank it seems to do the trick.

But as others have noted seems like your not cycled yet as well.

A few things to note if any of your rcs live

08-28-2012, 01:02 AM
I know the tank isnt cycled i kinda figured any bb on the sponge that i seedes shortly is allready dead. I was also told that since the rcs have such low bioloads they wont cause a big cycle. But i retro fitted a wisper filter with some crushed biomax from my canister filter hope it fixes my problem

08-28-2012, 01:36 AM
If you have another tank thats cycled you can always jack some filter media from that tank. Its what i do with my wet dry sump