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Been 10 weeks since last water change (doing this week) Nitrates high 20's, I would say heavy stocked, External Fluval 407 cannister. By heavy stock I have: 4 large rainbows, 1 large B/N catfish, 11 yellowfin Tetra, 2 Rednose Tetra, 2 Nerite snails & about 6-10 large shrimp. Almost forgot, 3 med...

I change 75% of my water (55 Gal) every other month (8 weeks). I do use RO water. Tanks been stable for the last 3 years, Fish, Shrimp, Plants & Nerites all doing well.

My BNC munching on a Courgette (Zuccini)

Hi Guys, due to my high KH/GH levels (source water issue) I have been looking into RO units. Is it possible to buy a small portable unit & connect it to a submersible pump to create a loop that takes water from my tank & puts it back in with lower hardness. Think most units need 3bar to run but...

Tank is now week 4. Test results are as follows: Nitrate: 10 Nitrite: 0.5 Ammonia: 0 GH: 15 KH: 10 PH: 7.5 Can't seem to get nitrites to zero. Going to remove some artificial plants & replace them with real. Will probably do a 25% water change & hoover when plants arrive early next week. Do you...

I do have one question, my filter (fluval 206) has the ability to reduce the flow. Does reducing have any effect on bacteria build up in giving them more time to anchor to bio media?

Things are moving along nicely. As my Ammonia & Nitrite levels were still just above zero, and still no sign of the Khuli, decided to remove all plants, pebbles, cave & large Mopani wood. No Khuli?. Gave the gravel a good hoover & did a 50% water change. Re-decorated with the addition of some...

Tap water Nitrate Slightly darker than 20ppm, probably around 25ppm.

Did a 50% water change about 5 hrs ago & have just tested using API drop tests. Nitrite 0.5 Nitrate 40 PH 7.4 Ammonia 0.25 GH 14 KH 13 Water Temp 25.4c Should I now leave things & stop chasing Ideals or is there anything urgent?

Thankyou.

Std 7.6, Filtered 6.7. after 18 hours: Std 8.3, Filtered 7.9

Bit of a disaster, found 1 dead mollie & 5 or so tetra at top of tank gulping for air. Did a quick strip test all ok other than nitrite 2ppm, nitrate 10ppm, slightly elevated but not lethal. Have been switching off air stone at night, not been a problem until this morning. Rookie mistake, my...

Told you I did not like the 6 in 1 test strips, they say 4-16 GH is ok. Also told you I was an amateur. Thanks......

Have ordered a GH/KH test kit as I do not trust the 6 in 1 test strips I have been using (strip indicated PH at 9.1. My pen & PH test kit indicated 7.6) will post GH/KH levels tomorrow. Confused with the "cannot thrive" as my fish suppliers details for recommended PH levels are: Mollies 6.5...

Will Do, thanks.

Hi, had Tropical Fish over 30 years ago (complete amateur) now decided to have another go. Bought a 190ltr corner tank about 3 weeks ago & after stabilising have now stocked it with: 2 gold sailfin mollies 2 red dwarf gourami 12 neon tetra 4 long fin danio 2 kuhli loaches (not seen since putting...