Ok to address the help I am getting -
1. The Filter is actually a Tetra 700 external
2. The gravel I have is quite fine
3. Most plants I have put in are growing and look healthy - some drop leaves and dissolve.
4. I only use a liquid API test kit not strips
5. Last night I did a 25% water change. Added the declorinator, salts and Bacteria (stability) after the change. Vacumed the gravel lightly getting poo and other friegn material (plant etc)
6. My readings this morning - PH 7.4. Nitrite .4, Ammonia 4.4, Nitrate 6, KH 4, GH 6, temp 27, Airstone on.
7. Last guppy now also on surface - babies still seem ok.
Next? do I do another water change tonight? 25% more? Vacum? F
Filter I checked the suction - when I put my finger of it it grabs ok - not crazy hard by def sucking, something I watch debris float past the suction - odd.