I'm going to buy some phosphate remover now. What % water change do you reckon & over what period?

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I care for:

1.0.0 Red Eared Slider (Trachemys scripta elegans)- 10/11 yrs old

0.0.2 Leopard-Spotted Catfish (Synodontis eupterus) -5/6 yrs old

0.0.1 Red Tailed Shark (Epalzeorhynchus bicolor) - 7 yrs old

2.1.0 Moggies - various ages

"The greatness of a nation and its moral progress can be measured
by the way in which its animals are treated."
- Mahatma Ghandi

no need to do loads of water changes.

i'd do a 25-30% change 4 times over the next fortnight then back to normal. Keep the phosphate remover in though. I'd recommend using the Seachem phosphate remover or Rowaphos

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1.1 leos, 1.1 fat tails, 0.2 Beardies, 1 Whites, 2.0 Cresties, 4.1 Cats, Fish: 4.4 P. Dovii, 5.5.6 Peacock Bass (5 sp), 1.1 C 'Cobra', 1.1 festae, 1.1 green terror, 1.1 nics, 1.1 C. Marmorata, 1.1 C. Johani, 1.1 C. 'Strigata', 1.1 C. 'red tapojas'; 1.1 P. Friedrichsthalli, 1.1 Mots, 1.1 managuense, 1.1 H. Bocourti, 1.1 H. Pearsi, 1.1 H. Carpinte, 1.1 H. Cynoguttatum, 1.1 V. Argentea, 1.1 V. Zonatus, 1.1 N. Salvini, 2.2 Grammodes, 3.4 Hoplarchus Pssiticus, 2.2 Trimacs, 3.4 haitiensis, 1.1 tetracanthus, 3.2 Red tiger mots, 14 Uaru (2 sp) 1.1 Umbies, 2 Arapaima, 3 Red tail catfish, 1.1 P. Leopoldii, 1.1 P. Motoro, 3 Silver Arowana, Var. polypterus, var. Channa sp, M. wyckii, 3 siamese tigers, 2 jelly catfish, 1 Golden dorado
Member number 1717

Cheers Guys,

These 3 fish are in a 4ft tank on their own. I'm thinking of upgrading it soon as they are quite terratorial so what do you think would be an ideal size & would last a while?

__________________
I care for:

1.0.0 Red Eared Slider (Trachemys scripta elegans)- 10/11 yrs old

0.0.2 Leopard-Spotted Catfish (Synodontis eupterus) -5/6 yrs old

0.0.1 Red Tailed Shark (Epalzeorhynchus bicolor) - 7 yrs old

2.1.0 Moggies - various ages

"The greatness of a nation and its moral progress can be measured
by the way in which its animals are treated."
- Mahatma Ghandi