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PostPosted: Jan 25th, '19, 16:42 
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So I harvested all my trout on the 14/12/18 and have 14 Silver Perch fingerlings spread in the main tank and the sump which I’ll carry over all into the sump when I get more trout. I’ve just done a pH test and $&@t myself when I read 8.4. Bl@@fy hell I’ve never had it this high even at start up, the ammonia is 0.25 which its pretty much always been and nitrate around 20+ so wondering if this rise is normal as I’m feeding bugger all as they’re small and more timid than hungry. I’m doing 150 L
Water top ups every 4-5 days due to evaporation and plant growth so I have the top up water in a 200L tank with oxygen bubbling in sun non stop. Am I missing something here?
Want to add a RFF and MBBR before I get more trout as they are filthy when growing well and 1 season the growbeds are quite dirty.
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PostPosted: Jan 27th, '19, 09:45 
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Hiya Liney, our scheme water in Perth is around 8pH and like your system my water hovers around 8 due to the water top ups. I don't think we need to aerate our top up water and just turn the hose on into the sump. Winter time the pH goes down to 6.
Not sure why you have an ammonia reading above 0 after how long your system has been running.

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PostPosted: Jan 27th, '19, 10:36 
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Hi Liney,

Yeah, I top up straight to my sump from the tap. I have a larger volume than you, but still, as Skeg says, probably safe to do this.

Have you been dosing your system with anything? Powerfeed etc? If you have dosed recently before taking the measurement, maybe it's just some residual. I had something similar a few months back and it was back to normal very quickly.

I've not check my system for a while, might do it now. :)

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Doctor Fish's system: viewtopic.php?f=18&t=28102

Total water volume ~3500L, FT = 2 x IBC, IBC Sump, RFF, BioFilt, GB = 1000L expanded clay + 535L DWC, Pump = PondMax EV-7200


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PostPosted: Jan 27th, '19, 11:36 
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To be honest I’ve dug around the growbeds hunting slugs and caterpillars and removing dead plants etc and the water is a little dirty looking so maybe I’ve released some gunk and minerals into the system. I’ve removed the shell grit for now and need to start planning my upgrades before trout season starts.


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PostPosted: Jan 27th, '19, 11:38 
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Yeah, my system is around 8 and the ammonia is about 1.5, but I dosed with Charlie Carp yesterday.

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Doctor Fish's system: viewtopic.php?f=18&t=28102

Total water volume ~3500L, FT = 2 x IBC, IBC Sump, RFF, BioFilt, GB = 1000L expanded clay + 535L DWC, Pump = PondMax EV-7200


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PostPosted: Jan 27th, '19, 13:19 
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DoctorFish wrote:
Yeah, my system is around 8 and the ammonia is about 1.5, but I dosed with Charlie Carp yesterday.

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I retested last night and got pH 7.2 so happy with that but I’ve never had 0 ammonia so will proceed with MBBR & RFF additions.


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PostPosted: Feb 10th, '19, 14:28 
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So I’ve made my mind up and am going to get a rainwater tank approximately 2500L for a FT but I’ll only have room for a 100L and 200L barrels for my RFF and a MBBR. What should the 200L barrel be? Thinking RFF and the smaller barrel for the MBBR. I’m moving the original FT 1000L to replace the original 600L sump so the weekend will become a major working bee.
Also I’ll need a bigger pump as there will be quite a bit more height to pump water up to the FT from a deeper sump. Hopefully get this done by March before trout season and then all my 14 SP can have a decent life in the sump away from greedy trout.


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