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Hi guys, In a few days I'll be getting a Fluval Edge to use a a coral-only tank (with live rock), as a number of people have done. It's only a very small tank (23L), but I'll be upgrading the lights (again as others have successfully done) to two MR16 LEDs (6k-6.5k) @ 240 lumens each, which...

Thanks guys, I'll vary between my current pellet and some (rinsed) frozen I think :)

Thanks Mike; I guess one of those marine quartet packs (mysis, seaweed, brineshrimp etc.) would be a good idea for variety? I just wasn't sure about the water from the frozen food polluting the tank etc...

Hi guys, I have a 10g nano, which houses a yellow clown goby, green clown goby and a small Ocellaris clown. I feed once a day. I was wondering what the best food is to use, both for the nutrition of the fish, and the least polluting of the water etc.? I'm currently using pellet, but used to...

Hi guys, I have a 10g nano, which houses a yellow clown goby, green clown goby and a small Ocellaris clown. I feed once a day. I was wondering what the best food is to use, both for the nutrition of the fish, and the least polluting of the water etc.? I'm currently using pellet, but used to...

Understood that nitrites aren't immediately fatal to fish, and that they have to come from ammonia. But, in the case of my PWC water, this has shown 0 ammonia consistently, and obviously the bacteria required to convert ammonia into nitrite aren't in my bucket! I'm with Kurt/mrg02d: I think...

Hi Kurt, I'm disappointed that the nitrites wouldn't be the problem, I thought I'd cracked it. Those levels of nitrites shouldn't be in my PWC water though, should they? I'm not using test strips, I use liquid ones (Seachem usually, and I've also run a reference sample to check the accuracy...

Guys, just had a major development with this. I was due to do a PWC today; and as each of the last 3 waterchanges I've done have resulted in fish deaths, I decided to do a thorough test on the PWC water before I put it in (as opposed to the normal temp/pH/SG checks I usually do); yes I know I...

Hi Thincat, It's the PWCs that have caused all the problems - the last three of them have caused fish deaths - with no explanation so far! I'm trying to find out a reason for it, but no luck as yet. When I said "fingers crossed", I meant I was hoping that the PWC goes okay without incident...

Definitely no rotten egg smell. I'm due a waterchange in the next couple of days (new salt and re-calibrated TDS meter), so it looks like all I can do is keep my fingers crossed...

I don't have a sump; my substrate is ceramic media, not sand, but yes it is possible that the substrate is slightly stirred up during a waterchange (I add water slowly though). Is it possible to test for Hydrogen Sulfide in the tank? Nothing new in the tank...

Hi Thincat, Thanks for the reply. My water parameters are stable and always have been (I use RO water @ <002ppm TDS), 1.025 SG, 0 ammonia/nitrate, and nitrates are approx 30ppm (no corals), pH 8.2. Temp is consistent. I feed high quality pellet/flake food usually, with the odd frozen as a...

Thanks, I'll keep an eye on the bristleworms. I've just got some new salt to see if it was that, and I've got some TDS calibration solution on the way to test/recalibrate my TDS meter, so I'll try a water change when this arrives and will see what happens to see if I can rule these two things...

Guys, on another note, yesterday I noticed a lot of worms at the bottom of my tank (look like bristleworms, approx 15 of them of different sizes); never noticed these before in this tank or any before. I guess they're not the reason for the waterchange issues, but should I be getting rid of...

Well, I've ordered a fresh batch of salt; and I'll make up some fresh RO for my next PWC. I'll also recalibrate my TDS meter to make sure it's showing accurate readings. Apart from this, are then any other tests I can do either in the new SW before I put it in the tank, or in the tank after a...

27-29°c

I guess it is either a problem with the salt, my RO water, or something that gets stirred up in the tank (in the media/rocks) when I'm doing a bit of cleaning. Although I would expect this to show up as ammonia? The RO filters should be fine (only a few months old), but yes you could be right...

Hi, no I didn't reuse the sand, I used brand new ceramic media (due to the filter, I would have preferred live sand), which seems to be doing its job as there's no ammonia/nitrites, although nitrates are high at 40ppm, but consistently so. I siphon out the tank water when I waterchange, and...

Thanks for the replies guys. My Royal Gramma gave up after approx 3 hours of deep breathing on the bottom; my green goby was actually okay and not affected (thought it was), and my yellow clown goby was breathing extremely fast, in the same spot, for almost 5 hours. This morning, I'm pleased to...

Guys, just to give you an update, this is so frustrating, and so odd. The LFS confirmed that everything was okay in my tank: ammonia, nitrites, SG, pH. I continued to test everything for a few days, and it was all fine, so I decided to purchase some replacement fish. These were a royal gramma...

Hi David, unfortunately that's not possible due to the placement of the filter. I've always had live sand in my previous tanks, and would have preferred it for this one. Still, in that regard the only issue is my nitrates which are high (40-50ppm), and PWCs don't seem to reduce them. I've...

Just done the test, Ammonia is 0 in the water container.

Thanks for all the help guys. David: I have coral rubble as my substrate (quite big pieces), and siphon as much debris etc. as I can off the rubble whenever I do a water change. Kurt: Yes, the clownfish showed problems literally 3 minutes after the gunk was stirred up, and within 30 minutes he...

It's a brand new RO unit I've got that's about 4 months old; I usually change the membranes every 6 months, or when the TDS starts increasing, whichever comes sooner. TDS is consistently 2ppm or less on the water I make up. I've done the exact same routine when doing a waterchange, every 2...

I use a refractometer, and always get the SG either spot on, or max. 0.001 either side. I make my own water using an RO unit (non-DI), and get TDS readings of 2ppm or lower. Whenever I change the water, I only ever do a max of 25% (often 20%), every 2 weeks; so it just seems odd that my...